[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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[372] | 5 | Const addressOfCatch As VoidPtr
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| 6 | Const basePtr As LONG_PTR
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| 7 | Const stackPtr As LONG_PTR
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[249] | 8 | context As CONTEXT
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| 9 | Const debugProcNum As DWord
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[58] | 10 |
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[372] | 11 | Sub TryLayer( addressOfCatch As VoidPtr, basePtr As LONG_PTR, stackPtr As LONG_PTR )
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| 12 | This.addressOfCatch = addressOfCatch
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| 13 | This.basePtr = basePtr
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| 14 | This.stackPtr = stackPtr
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[249] | 15 |
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[372] | 16 | Dim tempContext As CONTEXT
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| 17 |
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| 18 | tempContext.ContextFlags = CONTEXT_CONTROL or CONTEXT_INTEGER
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| 19 | If Thread.CurrentThread().__GetContext(tempContext) = 0 Then
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[249] | 20 | ' TODO: エラー処理
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| 21 | debug
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| 22 | End If
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[372] | 23 | context = tempContext
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[249] | 24 |
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| 25 | #ifdef _DEBUG
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| 26 | Dim ThreadNum As Long
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| 27 | ThreadNum=_DebugSys_GetThread()
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| 28 | If ThreadNum <> -1 Then
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| 29 | debugProcNum = _DebugSys_ProcNum[ThreadNum]
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| 30 | End If
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| 31 | #endif
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[58] | 32 | End Sub
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| 33 | Sub ~TryLayer()
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| 34 | End Sub
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| 35 | End Class
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| 36 |
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| 37 | Class ExceptionService
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| 38 | ppTryLayers As **TryLayer
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| 39 | nTryLayers As Long
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| 40 |
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| 41 | Sub FreeLocalObjects()
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| 42 | '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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| 43 | End Sub
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| 44 | Public
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| 45 |
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| 46 | Sub ExceptionService()
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| 47 | ppTryLayers = _System_malloc( 1 )
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| 48 | nTryLayers = 0
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| 49 | End Sub
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| 50 | Sub ~ExceptionService()
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| 51 | Dim i As Long
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| 52 | For i = 0 To ELM( nTryLayers )
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| 53 | Delete ppTryLayers[i]
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| 54 | Next
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| 55 | _System_free( ppTryLayers )
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| 56 | ppTryLayers = 0
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| 57 | End Sub
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| 58 |
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| 59 | 'Try
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[372] | 60 | Function BeginTryScope( addressOfCatch As VoidPtr, basePtr As LONG_PTR, stackPtr As LONG_PTR ) As TryLayer
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[58] | 61 | ppTryLayers = _System_realloc( ppTryLayers, ( nTryLayers + 1 ) * SizeOf( *TryLayer ) )
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[372] | 62 | ppTryLayers[nTryLayers] = New TryLayer( addressOfCatch, basePtr, stackPtr )
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[58] | 63 | nTryLayers++
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| 64 |
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[249] | 65 | Return ByVal ppTryLayers[nTryLayers-1]
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| 66 | End Function
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| 67 |
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[58] | 68 | 'End Try
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| 69 | Sub EndTryScope()
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| 70 | nTryLayers--
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| 71 | Delete ppTryLayers[nTryLayers]
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| 72 | End Sub
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| 73 |
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| 74 | 'Throw
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| 75 | Sub _Throw()
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| 76 | If nTryLayers <= 0 then
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| 77 | '例外処理スコープ制御が無効なとき
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| 78 |
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| 79 | 'TODO: 適切なエラー処理
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[249] | 80 | MessageBox( NULL, "例外", "", MB_OK or MB_ICONEXCLAMATION )
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[58] | 81 |
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| 82 | Return
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| 83 | End If
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| 84 |
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| 85 | '未解放なローカルオブジェクトを解放する
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| 86 | FreeLocalObjects()
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| 87 |
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| 88 |
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| 89 |
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| 90 | '--------------------------------------------------
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| 91 | ' スレッドのコンテキストを設定(Catchへ遷移する)
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| 92 | '--------------------------------------------------
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| 93 |
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[372] | 94 | 'レジスタ情報を取得
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| 95 | Dim context = ppTryLayers[nTryLayers - 1]->context
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| 96 |
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[58] | 97 | 'カレント スレッドを取得
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| 98 | Dim thread = Thread.CurrentThread
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| 99 |
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| 100 | '新しいip, spをセット
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| 101 | #ifdef _WIN64
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[372] | 102 | context.Rip = ppTryLayers[nTryLayers - 1]->addressOfCatch As QWord
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| 103 | context.Rbp = ppTryLayers[nTryLayers - 1]->basePtr
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| 104 | context.Rsp = ppTryLayers[nTryLayers - 1]->stackPtr
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[58] | 105 | #else
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[372] | 106 | context.Eip = ppTryLayers[nTryLayers - 1]->addressOfCatch As DWord
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| 107 | context.Ebp = ppTryLayers[nTryLayers - 1]->basePtr
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| 108 | context.Esp = ppTryLayers[nTryLayers - 1]->stackPtr
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[58] | 109 | #endif
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[249] | 110 |
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| 111 | #ifdef _DEBUG
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| 112 | Dim ThreadNum As Long
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| 113 | ThreadNum=_DebugSys_GetThread()
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| 114 | If ThreadNum <> -1 Then
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| 115 | _DebugSys_ProcNum[ThreadNum] = ppTryLayers[nTryLayers - 1]->debugProcNum-1
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| 116 | End If
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| 117 | #endif
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[372] | 118 | debug
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[58] | 119 | If thread.__SetContext( context ) = 0 Then
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| 120 | OutputDebugString(Ex"レジスタ情報の設定に失敗しました。\r\n")
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| 121 | Return
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| 122 | End If
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[372] | 123 | debug
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[58] | 124 | End Sub
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| 125 |
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| 126 | Sub _Throw( msg As String )
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| 127 | _Throw()
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| 128 | End Sub
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| 129 |
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| 130 | Static Sub AllocateObject( pObj As VoidPtr )
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| 131 | Dim thread = Thread.CurrentThread
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| 132 | 'TODO: ローカルオブジェクトを登録
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| 133 | End Sub
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| 134 |
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| 135 | Static Sub DeallocateObject( pObj As VoidPtr )
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| 136 | 'TODO: ローカルオブジェクトを破棄
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| 137 | End Sub
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| 138 | End Class
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| 139 |
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