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Golang CGO异常0x40010006

seh cgo go c++

microo8 · 技术社区 · 5 年前

我试着用cgo从dll运行一个函数。这个库是c++的,所以我创建了一个c头,这里是定义的函数和 .cpp

#ifdef __cplusplus
extern "C" {
#endif

void* LoadEngine(char*);

#ifdef __cplusplus
}
#endif

库.cpp:

#include <Engine.h> //the library

void* LoadEngine(char *sn) {
  Engine *e;
  GetEngineObject(sn, &e); //function from the dll, here it fails
  return (void*) e;
}

然后称之为:

package main

/*
#include "lib.h"
*/
import "C"

func main() {
  e := C.LoadEngine(C.CString("foobar")
  ...
}

我有 go1.12 windows/amd64 和 mingw-w64-posix-seh

也试过了 mingw-w64-posix-sjlj , mingw-w64-win32-seh , mingw-w64-win32-sjlj ,但结果相同,或者根本不编译

只是用 go build 以及:

#cgo windows CFLAGS: -IC:/Engine/Inc
#cgo windows CPPFLAGS: -IC:/Engine/Inc
#cgo windows LDFLAGS: -LC:/Engine/Bin64 -lEngine -lEngineObj -lole32 -loleaut32 -luuid

在win8上运行正常,但在win10+上,如果函数开始调用 GetEngineObject 来自dll的,它失败的原因是:

Exception 0x40010006 0x1 0x8deb90 0x7ffbc9ada388
PC=0x7ffbc9ada388

runtime: unknown pc 0x7ffbc9ada388
stack: frame={sp:0x8dea80, fp:0x0} stack=[0x0,0x8dfdf0)
00000000008de980:  0000000002000002  000000002a080321
00000000008de990:  0000000090000191  0000000000000321
00000000008de9a0:  0000000500000008  0000000500000000
00000000008de9b0:  feeefeeefeeefeee  00000000024c0150
00000000008de9c0:  0000000000000000  0000000000000000
00000000008de9d0:  00000000024c0000  00007ffbccb730ac
00000000008de9e0:  0000000002680000  00000000024c1e30
00000000008de9f0:  00000000026a2d90  00000000026ad480
00000000008dea00:  0000000000000df1  0000000000000000
00000000008dea10:  0000000000000df1  0000000000000df1
00000000008dea20:  0000000000001bf8  0000000000000000
00000000008dea30:  0000000090000191  0000000000000003
00000000008dea40:  0000bcc3daf1f4cb  00000000026a2d00
00000000008dea50:  0000000000000000  000002fffb442d78
00000000008dea60:  0000000000000000  00000000008dfb00
00000000008dea70:  0000000000000020  00007ffbc9ada388
00000000008dea80: <00000000024c0000  000000002fbe1490
00000000008dea90:  00000000008df970  00000000ffffffff
00000000008deaa0:  0000000040010006  0000000000000000
00000000008deab0:  00007ffbc9ada388  0000000000000002
00000000008deac0:  0000000000000001  00000000008deb90
00000000008dead0:  00000000001b0150  0000000000800000
00000000008deae0:  00000000026ad480  0000000000000000
00000000008deaf0:  00000000001b10b0  0000000000690000
00000000008deb00:  00000000024c0000  00007ffbccbbcafa
00000000008deb10:  00000000024c0000  00007ffbccb76ff8
00000000008deb20:  00000000026a2d90  00000000026a9c30
00000000008deb30:  0000000000000000  0000000000000001
00000000008deb40:  00002c98037a65f6  000000000000001f
00000000008deb50:  00000000026a9430  000000002fd8a367
00000000008deb60:  0000000000006000  00000000024c0000
00000000008deb70:  0000000000000df1  0000000000000000
runtime: unknown pc 0x7ffbc9ada388
stack: frame={sp:0x8dea80, fp:0x0} stack=[0x0,0x8dfdf0)
00000000008de980:  0000000002000002  000000002a080321
00000000008de990:  0000000090000191  0000000000000321
00000000008de9a0:  0000000500000008  0000000500000000
00000000008de9b0:  feeefeeefeeefeee  00000000024c0150
00000000008de9c0:  0000000000000000  0000000000000000
00000000008de9d0:  00000000024c0000  00007ffbccb730ac
00000000008de9e0:  0000000002680000  00000000024c1e30
00000000008de9f0:  00000000026a2d90  00000000026ad480
00000000008dea00:  0000000000000df1  0000000000000000
00000000008dea10:  0000000000000df1  0000000000000df1
00000000008dea20:  0000000000001bf8  0000000000000000
00000000008dea30:  0000000090000191  0000000000000003
00000000008dea40:  0000bcc3daf1f4cb  00000000026a2d00
00000000008dea50:  0000000000000000  000002fffb442d78
00000000008dea60:  0000000000000000  00000000008dfb00
00000000008dea70:  0000000000000020  00007ffbc9ada388
00000000008dea80: <00000000024c0000  000000002fbe1490
00000000008dea90:  00000000008df970  00000000ffffffff
00000000008deaa0:  0000000040010006  0000000000000000
00000000008deab0:  00007ffbc9ada388  0000000000000002
00000000008deac0:  0000000000000001  00000000008deb90
00000000008dead0:  00000000001b0150  0000000000800000
00000000008deae0:  00000000026ad480  0000000000000000
00000000008deaf0:  00000000001b10b0  0000000000690000
00000000008deb00:  00000000024c0000  00007ffbccbbcafa
00000000008deb10:  00000000024c0000  00007ffbccb76ff8
00000000008deb20:  00000000026a2d90  00000000026a9c30
00000000008deb30:  0000000000000000  0000000000000001
00000000008deb40:  00002c98037a65f6  000000000000001f
00000000008deb50:  00000000026a9430  000000002fd8a367
00000000008deb60:  0000000000006000  00000000024c0000
00000000008deb70:  0000000000000df1  0000000000000000

goroutine 1 [syscall]:
path/to/package._Cfunc_LoadEngine(0x23a2c20, 0x0)
        _cgo_gotypes.go:518 +0x51
path/to/package.Load(0x4d05ad, 0x1d, 0x0, 0x0, 0x0)
        C:/Users/microo8/Documents/workspace/src/path/to/package/fre.go:55 +0x89
main.main()
        W:/Workspace/src/path/to/package/test/test.go:12 +0x41
rax     0x3e00003e
rbx     0x2fbe1490
rcx     0xfffffffffffffffe
rdi     0xffffffff
rsi     0x8df970
rbp     0x20
rsp     0x8dea80
r8      0x2fca2793
r9      0x3a0f4c0
r10     0x2fca2701
r11     0x26aadb0
r12     0x8dfb00
r13     0x0
r14     0x2fffb442d78
r15     0x0
rip     0x7ffbc9ada388
rflags  0x202
cs      0x33
fs      0x53
gs      0x2b

我也试着抓住明的例外 __try1 和 __except1 但无论如何都失败了。尝试了不同的mingw版本,使用 -ldflags="-linkmode internal" 但这不是编译和 -ldflags="-linkmode external" 也有例外。

编辑: 也试着打电话给 LoadEngine 函数(从 lib.h lib.cpp 具有 g++ 到 lib.o test.c 我刚打电话给 装载机 只是从 main

0 回复 | 直到 5 年前

microo8 5 年前

出于某种原因,在win10+上它会提高 DBG_PRINTEXCEPTION_C . 这是由于 OutputDebugStringW

我想通常情况下,微软的 __try and __except

但我发现,你可以加一个 Exception Handler

那么现在呢库.cpp:

#include <Engine.h> //the library
#ifdef _WIN32
#include <windows.h>

LONG WINAPI VectoredHandler(struct _EXCEPTION_POINTERS *ExceptionInfo) {
   UNREFERENCED_PARAMETER(ExceptionInfo);  
   return EXCEPTION_CONTINUE_EXECUTION;  //just continue
}
#endif


void* LoadEngine(char *sn) {
#ifdef _WIN32
  PVOID handler = AddVectoredContinueHandler(1, VectoredHandler);
#endif
  Engine *e;
  GetEngineObject(sn, &e);
#ifdef _WIN32
  RemoveVectoredContinueHandler(handler); 
#endif
  return (void*) e;
}

因为使用库从加载引擎开始,到卸载引擎结束,而引擎是一个单例,所以我刚刚做了 PVOID handler AddVectoredContinueHandler LoadEngine 和 RemoveVectoredContinueHandler UnloadEngine .