[58] | 1 | 'TODO: ローカルオブジェクト確保及び解放時にTryServiceに通知する必要がある。
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| 2 |
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| 3 | Class TryLayer
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| 4 | Public
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| 5 | Const AddressOfCatch As VoidPtr
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| 6 | Const StackPtr As LONG_PTR
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[249] | 7 | context As CONTEXT
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| 8 | Const debugProcNum As DWord
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[58] | 9 |
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| 10 | Sub TryLayer( AddressOfCatch As VoidPtr, StackPtr As LONG_PTR )
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| 11 | This.AddressOfCatch = AddressOfCatch
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| 12 | This.StackPtr = StackPtr
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[249] | 13 |
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| 14 | context.ContextFlags=CONTEXT_ALL
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| 15 | If Thread.CurrentThread().__GetContext(context) = 0 Then
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| 16 | ' TODO: エラー処理
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| 17 | debug
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| 18 | End If
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| 19 |
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| 20 | #ifdef _DEBUG
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| 21 | Dim ThreadNum As Long
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| 22 | ThreadNum=_DebugSys_GetThread()
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| 23 | If ThreadNum <> -1 Then
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| 24 | debugProcNum = _DebugSys_ProcNum[ThreadNum]
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| 25 | End If
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| 26 | #endif
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[58] | 27 | End Sub
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| 28 | Sub ~TryLayer()
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| 29 | End Sub
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| 30 | End Class
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| 31 |
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| 32 | Class ExceptionService
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| 33 | ppTryLayers As **TryLayer
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| 34 | nTryLayers As Long
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| 35 |
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| 36 | Sub FreeLocalObjects()
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| 37 | 'TODO: 破棄されていないローカルオブジェクトを破棄
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| 38 | End Sub
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| 39 | Public
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| 40 |
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| 41 | Sub ExceptionService()
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| 42 | ppTryLayers = _System_malloc( 1 )
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| 43 | nTryLayers = 0
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| 44 | End Sub
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| 45 | Sub ~ExceptionService()
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| 46 | Dim i As Long
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| 47 | For i = 0 To ELM( nTryLayers )
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| 48 | Delete ppTryLayers[i]
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| 49 | Next
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| 50 | _System_free( ppTryLayers )
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| 51 | ppTryLayers = 0
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| 52 | End Sub
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| 53 |
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| 54 | 'Try
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[249] | 55 | Function BeginTryScope( AddressOfCatch As VoidPtr, StackPtr As LONG_PTR ) As TryLayer
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[58] | 56 | ppTryLayers = _System_realloc( ppTryLayers, ( nTryLayers + 1 ) * SizeOf( *TryLayer ) )
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| 57 | ppTryLayers[nTryLayers] = New TryLayer( AddressOfCatch, StackPtr )
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| 58 | nTryLayers++
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| 59 |
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[249] | 60 | Return ByVal ppTryLayers[nTryLayers-1]
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| 61 | End Function
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| 62 |
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[58] | 63 | 'End Try
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| 64 | Sub EndTryScope()
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| 65 | nTryLayers--
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| 66 | Delete ppTryLayers[nTryLayers]
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| 67 | End Sub
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| 68 |
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| 69 | 'Throw
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| 70 | Sub _Throw()
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| 71 | If nTryLayers <= 0 then
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| 72 | '例外処理スコープ制御が無効なとき
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| 73 |
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| 74 | 'TODO: 適切なエラー処理
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[249] | 75 | MessageBox( NULL, "例外", "", MB_OK or MB_ICONEXCLAMATION )
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[58] | 76 |
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| 77 | Return
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| 78 | End If
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| 79 |
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| 80 | '未解放なローカルオブジェクトを解放する
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| 81 | FreeLocalObjects()
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| 82 |
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| 83 |
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| 84 |
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| 85 | '--------------------------------------------------
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| 86 | ' スレッドのコンテキストを設定(Catchへ遷移する)
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| 87 | '--------------------------------------------------
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| 88 |
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| 89 | 'カレント スレッドを取得
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| 90 | Dim thread = Thread.CurrentThread
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| 91 |
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| 92 | 'レジスタ情報を取得
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[249] | 93 | Dim context = ppTryLayers[nTryLayers - 1]->context
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| 94 | debug
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[58] | 95 | '新しいip, spをセット
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| 96 | #ifdef _WIN64
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[237] | 97 | context.Rip = ppTryLayers[nTryLayers - 1]->AddressOfCatch As QWord
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[249] | 98 | 'context.Rsp = ppTryLayers[nTryLayers - 1]->StackPtr
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[58] | 99 | #else
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[237] | 100 | context.Eip = ppTryLayers[nTryLayers - 1]->AddressOfCatch As DWord
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[58] | 101 | context.Esp = ppTryLayers[nTryLayers - 1]->StackPtr
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| 102 | #endif
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[249] | 103 |
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| 104 | #ifdef _DEBUG
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| 105 | Dim ThreadNum As Long
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| 106 | ThreadNum=_DebugSys_GetThread()
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| 107 | If ThreadNum <> -1 Then
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| 108 | _DebugSys_ProcNum[ThreadNum] = ppTryLayers[nTryLayers - 1]->debugProcNum-1
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| 109 | End If
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| 110 | #endif
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| 111 |
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[58] | 112 | If thread.__SetContext( context ) = 0 Then
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| 113 | OutputDebugString(Ex"レジスタ情報の設定に失敗しました。\r\n")
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| 114 | Return
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| 115 | End If
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| 116 | End Sub
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| 117 |
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| 118 | Sub _Throw( msg As String )
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| 119 | _Throw()
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| 120 | End Sub
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| 121 |
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| 122 | Static Sub AllocateObject( pObj As VoidPtr )
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| 123 | Dim thread = Thread.CurrentThread
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| 124 | 'TODO: ローカルオブジェクトを登録
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| 125 | End Sub
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| 126 |
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| 127 | Static Sub DeallocateObject( pObj As VoidPtr )
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| 128 | 'TODO: ローカルオブジェクトを破棄
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| 129 | End Sub
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| 130 | End Class
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| 131 |
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