我在Linux中遇到了Mono Interop的問題。我有一個本地共享庫(在Lazarus中製作),我需要在C#程序集中使用它。共享庫由Windows和Linux上的Mono C#組件使用。Mono(linux)中的DLLImport崩潰:icall_wrapper_mono_marshal_free
該程序集在運行時通過DllImport加載共享庫,並調用導出的函數,該函數生成一個文件並返回一個包含新文件名的字符串。共享庫中的函數工作正常,但在Linux中,Mono運行時在函數返回時在Object .__ icall_wrapper_mono_marshal_free處崩潰。這在Windows上使用Mono很好。
我做了幾個測試,我可以告訴共享庫實際上工作(新文件在指定的路徑生成),但最終運行時崩潰。看起來,運行時將結果字符串封送回程序集時出現問題,因爲如果我使用返回int的導出函數,則運行時會起作用。
我的共享庫是這樣的:
library fileProcessing;
{$mode objfpc}{$H+}
...
function ProcessFile(File, ResultPath: PChar): PChar; cdecl; // returns a null-terminated string, with a C ABI calling convention
var
sFile, sPath, sResult: string;
begin
sFile := StrPas(File);
sPath := StrPas(ResultPath);
...
sResult := GenerateNewFile(sFile, sPath); // helper function that generates the file and returns its filename
Result := stralloc(length(sResult) + 1);
Result := strpcopy(Result, sResult);
end;
...
exports ProcessFile name 'ProcessFile';
調用C#組件是這樣的:
namespace SIG
{
public class TsigKernel
{
...
[DllImport("fileProcessing.so", CharSet=CharSet.Ansi,
EntryPoint="ProcessFile",
CallingConvention=CallingConvention.Cdecl, SetLastError = true)]
private static extern string ex_ProcessFile(string File, string ResultPath);
// managed wrapper for the shared library exported function
public string ProcessFile(string File, string ResultPath)
{
return ex_ProcessFile(File, ResultPath);
}
...
}
}
我試過幾個備選方案(返回從導出的函數本地字符串,將調用約定更改爲程序集和共享庫上的stdcall,更改DllImport中的字符集)。
我確定我錯過了一些東西,但在Google上我沒有發現任何有關此問題的信息。
我崩潰寫道:
=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================
Stacktrace:
at (wrapper managed-to-native) object.__icall_wrapper_mono_marshal_free (intptr) <0x00004>
at (wrapper managed-to-native) object.__icall_wrapper_mono_marshal_free (intptr) <0x00004>
at (wrapper managed-to-native) SIG.TsigKernel.ex_ProcessFile (string, string) <0x00064>
at SIG.TsigKernel.ProcessFile (string, string) <0x00010>
at TEST.Form1.Form1_Load (object,System.EventArgs) <0x00047>
at System.Windows.Forms.Form.OnLoad (System.EventArgs) <0x00060>
at System.Windows.Forms.Form.OnLoadInternal (System.EventArgs) <0x00081>
at System.Windows.Forms.Form.OnCreateControl() <0x00051>
at System.Windows.Forms.Control.CreateControl() <0x0012e>
at System.Windows.Forms.Control.WmShowWindow (System.Windows.Forms.Message&) <0x0010f>
at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message&) <0x00292>
at System.Windows.Forms.ScrollableControl.WndProc (System.Windows.Forms.Message&) <0x00013>
at System.Windows.Forms.ContainerControl.WndProc (System.Windows.Forms.Message&) <0x00051>
at System.Windows.Forms.Form.WndProc (System.Windows.Forms.Message&) <0x0022a>
at System.Windows.Forms.Control/ControlWindowTarget.OnMessage (System.Windows.Forms.Message&) <0x0001d>
at System.Windows.Forms.Control/ControlNativeWindow.WndProc (System.Windows.Forms.Message&) <0x0002d>
at System.Windows.Forms.NativeWindow.WndProc (intptr,System.Windows.Forms.Msg,intptr,intptr) <0x001eb>
at System.Windows.Forms.XplatUIX11.SendMessage (intptr,System.Windows.Forms.Msg,intptr,intptr) <0x002ae>
at System.Windows.Forms.XplatUIX11.MapWindow (System.Windows.Forms.Hwnd,System.Windows.Forms.WindowType) <0x0019a>
at System.Windows.Forms.XplatUIX11.CreateWindow (System.Windows.Forms.CreateParams) <0x00bb4>
at System.Windows.Forms.XplatUI.CreateWindow (System.Windows.Forms.CreateParams) <0x0001d>
at System.Windows.Forms.NativeWindow.CreateHandle (System.Windows.Forms.CreateParams) <0x00030>
at System.Windows.Forms.Control.CreateHandle() <0x0007f>
at System.Windows.Forms.Form.CreateHandle() <0x00014>
at System.Windows.Forms.Control.CreateControl() <0x0008a>
at System.Windows.Forms.Control.SetVisibleCore (bool) <0x00079>
at System.Windows.Forms.Form.SetVisibleCore (bool) <0x0021d>
at System.Windows.Forms.Control.set_Visible (bool) <0x0002c>
at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control.set_Visible (bool) <0x00057>
at System.Windows.Forms.Application.RunLoop (bool,System.Windows.Forms.ApplicationContext) <0x001f9>
at System.Windows.Forms.Application.Run (System.Windows.Forms.ApplicationContext) <0x00052>
at System.Windows.Forms.Application.Run (System.Windows.Forms.Form) <0x00033>
at TEST.Program.Main() <0x00044>
at (wrapper runtime-invoke) object.runtime_invoke_void (object,intptr,intptr,intptr) <0x0003a>
Native stacktrace:
mono [0x80d36a9]
[0xffffe410]
[0xffffe430]
/lib/libc.so.6(gsignal+0x4f) [0xb76430cf]
/lib/libc.so.6(abort+0x187) [0xb76449e7]
/lib/libc.so.6 [0xb767f4ed]
/lib/libc.so.6 [0xb768550b]
/lib/libc.so.6 [0xb7686de4]
/lib/libc.so.6(cfree+0x6d) [0xb7689fdd]
/usr/lib/libglib-2.0.so.0(g_free+0x36) [0xb780d886]
[0xb6561634]
[0xb5786a5d]
[0xb57869d1]
[0xb57866c8]
[0xb5786599]
[0xb578632a]
[0xb5785f7a]
[0xb605dbe7]
[0xb578c7c0]
[0xb578bbfb]
[0xb57820c4]
[0xb578208a]
[0xb5781eeb]
[0xb578b95e]
[0xb578b936]
[0xb578ac74]
[0xb5788acf]
[0xb578c4b3]
[0xb605eca5]
[0xb605e0e6]
[0xb605e069]
[0xb605ddf0]
[0xb57804bd]
[0xb605db43]
[0xb57938a2]
[0xb57800a6]
[0xb57937f5]
[0xb5793798]
[0xb577f062]
[0xb577ee13]
[0xb577eacc]
[0xb71ce1f5]
[0xb71ce26b]
mono [0x8063552]
任何想法?
非常感謝你。我已經看到了這些文檔,但我完全錯過了StringBuilder方法。現在它工作正常。 – Arcturus 2010-01-11 15:37:57