[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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[374] | 5 | Const catchTable As *LONG_PTR
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| 6 | Const addressOfFinally As VoidPtr
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[372] | 7 | Const basePtr As LONG_PTR
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| 8 | Const stackPtr As LONG_PTR
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[374] | 9 |
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[249] | 10 | Const debugProcNum As DWord
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[58] | 11 |
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[374] | 12 | Sub TryLayer( catchTable As *LONG_PTR, addressOfFinally As VoidPtr, basePtr As LONG_PTR, stackPtr As LONG_PTR )
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| 13 | This.catchTable = catchTable
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| 14 | This.addressOfFinally = addressOfFinally
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[372] | 15 | This.basePtr = basePtr
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| 16 | This.stackPtr = stackPtr
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[249] | 17 |
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| 18 | #ifdef _DEBUG
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| 19 | Dim ThreadNum As Long
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| 20 | ThreadNum=_DebugSys_GetThread()
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| 21 | If ThreadNum <> -1 Then
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| 22 | debugProcNum = _DebugSys_ProcNum[ThreadNum]
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| 23 | End If
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| 24 | #endif
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[58] | 25 | End Sub
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| 26 | Sub ~TryLayer()
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| 27 | End Sub
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[374] | 28 |
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| 29 | Sub FinishFinally()
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| 30 | If Thread.CurrentThread().__IsThrowing() Then
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| 31 | Throw Thread.CurrentThread().__GetThrowintParamObject()
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| 32 | End If
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| 33 | End Sub
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| 34 |
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| 35 | Function ResolveCatchesOverload( ex As Object ) As LONG_PTR
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| 36 | Dim defaultCatchCodePos = 0 As LONG_PTR
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| 37 | Dim pos = 0 As Long
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| 38 | While catchTable[pos]
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| 39 | ' パラメータのクラス名
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| 40 | Dim paramName = catchTable[pos] As *Char
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| 41 | pos ++
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| 42 |
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| 43 | ' コード位置
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| 44 | Dim codePos = catchTable[pos] As LONG_PTR
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| 45 | pos ++
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| 46 |
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| 47 | If paramName[0] = 0 Then
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| 48 | ' Default Catch
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| 49 | defaultCatchCodePos = codePos
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| 50 | End If
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| 51 |
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| 52 | If Object.ReferenceEquals( ex, Nothing ) Then
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| 53 | ' パラメータなしのとき
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| 54 | If paramName[0] = 0 Then
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| 55 | ' マッチしたとき
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| 56 | Return codePos
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| 57 | End If
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| 58 | Else
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[388] | 59 | If isCatchable(New String(paramName), ex.GetType()) Then
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| 60 | ' If lstrcmp( paramName, ex.GetType().FullName ) = 0 Then
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[374] | 61 | ' マッチしたとき
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| 62 | Return codePos
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| 63 | End If
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| 64 | End If
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| 65 | Wend
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| 66 | Return defaultCatchCodePos
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| 67 | End Function
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[388] | 68 |
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| 69 | Function isCatchable(paramName As String, catchType As System.TypeInfo) As Boolean
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| 70 | isCatchable = False
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| 71 | While Not ActiveBasic.IsNothing(catchType)
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| 72 | Dim catchTypeName = catchType.FullName
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| 73 | If paramName = catchTypeName Then
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| 74 | isCatchable = True
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| 75 | Exit Function
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| 76 | End If
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| 77 | catchType = catchType.BaseType
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| 78 | Wend
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| 79 | End Function
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[58] | 80 | End Class
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| 81 |
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| 82 | Class ExceptionService
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| 83 | ppTryLayers As **TryLayer
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| 84 | nTryLayers As Long
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| 85 |
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| 86 | Sub FreeLocalObjects()
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| 87 | '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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| 88 | End Sub
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| 89 | Public
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| 90 |
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| 91 | Sub ExceptionService()
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| 92 | ppTryLayers = _System_malloc( 1 )
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| 93 | nTryLayers = 0
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| 94 | End Sub
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| 95 | Sub ~ExceptionService()
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| 96 | Dim i As Long
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| 97 | For i = 0 To ELM( nTryLayers )
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| 98 | Delete ppTryLayers[i]
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| 99 | Next
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| 100 | _System_free( ppTryLayers )
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| 101 | ppTryLayers = 0
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| 102 | End Sub
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| 103 |
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| 104 | 'Try
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[374] | 105 | Function _BeginTryScope( catchTable As *LONG_PTR, addressOfFinally As VoidPtr, basePtr As LONG_PTR, stackPtr As LONG_PTR ) As TryLayer
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[58] | 106 | ppTryLayers = _System_realloc( ppTryLayers, ( nTryLayers + 1 ) * SizeOf( *TryLayer ) )
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[374] | 107 | ppTryLayers[nTryLayers] = New TryLayer( catchTable, addressOfFinally, basePtr, stackPtr )
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[58] | 108 | nTryLayers++
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| 109 |
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[249] | 110 | Return ByVal ppTryLayers[nTryLayers-1]
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| 111 | End Function
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| 112 |
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[374] | 113 | Static Function BeginTryScope( catchTable As *LONG_PTR, addressOfFinally As VoidPtr, basePtr As LONG_PTR, stackPtr As LONG_PTR ) As TryLayer
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| 114 | Return _System_pobj_AllThreads->GetCurrentException()->_BeginTryScope( catchTable, addressOfFinally, basePtr, stackPtr )
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[373] | 115 | End Function
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| 116 |
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[58] | 117 | 'End Try
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| 118 | Sub EndTryScope()
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| 119 | nTryLayers--
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| 120 | Delete ppTryLayers[nTryLayers]
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| 121 | End Sub
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| 122 |
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| 123 | 'Throw
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[374] | 124 | Sub _Throw( ex As Object )
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[58] | 125 | If nTryLayers <= 0 then
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| 126 | '例外処理スコープ制御が無効なとき
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| 127 |
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| 128 | 'TODO: 適切なエラー処理
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[388] | 129 | MessageBox( NULL, "Catchされていない例外があります", NULL, MB_OK or MB_ICONEXCLAMATION )
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| 130 | Debug
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[58] | 131 | Return
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| 132 | End If
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| 133 |
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[374] | 134 | ' スレッドへThrow処理を開始したことを通知
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| 135 | Thread.CurrentThread().__Throw( ex )
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| 136 |
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[58] | 137 | '未解放なローカルオブジェクトを解放する
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| 138 | FreeLocalObjects()
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| 139 |
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[374] | 140 | Dim pTryLayer = ppTryLayers[nTryLayers - 1] As *TryLayer
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[58] | 141 |
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[374] | 142 | Dim addressOfCatch = pTryLayer->ResolveCatchesOverload( ex ) As LONG_PTR
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[375] | 143 | If addressOfCatch = NULL Then
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[374] | 144 | ' Catchが定義されていないときはFinallyへ誘導
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| 145 | addressOfCatch = pTryLayer->addressOfFinally As LONG_PTR
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| 146 | End If
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[58] | 147 |
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[374] | 148 |
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[58] | 149 | '--------------------------------------------------
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| 150 | ' スレッドのコンテキストを設定(Catchへ遷移する)
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| 151 | '--------------------------------------------------
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| 152 |
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[373] | 153 | Dim context As CONTEXT
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| 154 | context.ContextFlags = CONTEXT_CONTROL or CONTEXT_INTEGER
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| 155 | If GetThreadContext( GetCurrentThread(), context ) = 0 Then
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| 156 | ' TODO: エラー処理
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| 157 | debug
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| 158 | End If
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[372] | 159 |
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[373] | 160 | '新しいip, sp, bpをセット
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[58] | 161 | #ifdef _WIN64
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[374] | 162 | context.Rip = addressOfCatch As QWord
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| 163 | context.Rbp = pTryLayer->basePtr
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| 164 | context.Rsp = pTryLayer->stackPtr
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[58] | 165 | #else
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[374] | 166 | context.Eip = addressOfCatch As DWord
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| 167 | context.Ebp = pTryLayer->basePtr
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| 168 | context.Esp = pTryLayer->stackPtr
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[58] | 169 | #endif
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[249] | 170 |
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| 171 | #ifdef _DEBUG
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| 172 | Dim ThreadNum As Long
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| 173 | ThreadNum=_DebugSys_GetThread()
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| 174 | If ThreadNum <> -1 Then
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[374] | 175 | _DebugSys_ProcNum[ThreadNum] = pTryLayer->debugProcNum-1
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[249] | 176 | End If
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| 177 | #endif
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[373] | 178 |
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| 179 | If SetThreadContext( GetCurrentThread(), context ) = 0 Then
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[58] | 180 | OutputDebugString(Ex"レジスタ情報の設定に失敗しました。\r\n")
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| 181 | Return
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| 182 | End If
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| 183 | End Sub
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| 184 |
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[374] | 185 | Sub _ThrowWithParam( ex As Object )
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| 186 | _Throw( ex )
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[58] | 187 | End Sub
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[374] | 188 |
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| 189 | Sub _ThrowNoneParam()
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| 190 | _Throw( Nothing )
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| 191 | End Sub
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| 192 |
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| 193 | Sub FinishFinally()
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| 194 | Dim pTryLayer = ppTryLayers[nTryLayers - 1] As *TryLayer
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| 195 | pTryLayer->FinishFinally()
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| 196 | End Sub
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[58] | 197 | End Class
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| 198 |
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