[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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[411] | 30 | Imports System.Threading
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[374] | 31 | If Thread.CurrentThread().__IsThrowing() Then
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| 32 | Throw Thread.CurrentThread().__GetThrowintParamObject()
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| 33 | End If
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| 34 | End Sub
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| 35 |
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| 36 | Function ResolveCatchesOverload( ex As Object ) As LONG_PTR
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[411] | 37 | OutputDebugString("ResolveCatchesOverload: ")
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| 38 | OutputDebugString(ToTCStr(ex.ToString))
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| 39 | OutputDebugString(Ex"\r\n")
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[374] | 40 | Dim defaultCatchCodePos = 0 As LONG_PTR
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| 41 | Dim pos = 0 As Long
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| 42 | While catchTable[pos]
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| 43 | ' パラメータのクラス名
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| 44 | Dim paramName = catchTable[pos] As *Char
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| 45 | pos ++
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| 46 |
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| 47 | ' コード位置
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| 48 | Dim codePos = catchTable[pos] As LONG_PTR
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| 49 | pos ++
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| 50 |
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| 51 | If paramName[0] = 0 Then
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| 52 | ' Default Catch
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| 53 | defaultCatchCodePos = codePos
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| 54 | End If
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| 55 |
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| 56 | If Object.ReferenceEquals( ex, Nothing ) Then
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| 57 | ' パラメータなしのとき
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| 58 | If paramName[0] = 0 Then
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| 59 | ' マッチしたとき
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| 60 | Return codePos
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| 61 | End If
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| 62 | Else
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[388] | 63 | If isCatchable(New String(paramName), ex.GetType()) Then
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| 64 | ' If lstrcmp( paramName, ex.GetType().FullName ) = 0 Then
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[374] | 65 | ' マッチしたとき
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| 66 | Return codePos
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| 67 | End If
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| 68 | End If
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| 69 | Wend
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| 70 | Return defaultCatchCodePos
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| 71 | End Function
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[411] | 72 | Private
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[388] | 73 | Function isCatchable(paramName As String, catchType As System.TypeInfo) As Boolean
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[411] | 74 | /* If Not String.IsNullOrEmpty(paramName) Then
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| 75 | Dim paramType = _System_TypeBase_Search(paramName)
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| 76 | isCatchable = ActiveBasic.Detail.IsBaseOf(catchType, paramType)
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| 77 | Else
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| 78 | isCatchable = False
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| 79 | End If
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| 80 | /*/
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[388] | 81 | isCatchable = False
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| 82 | While Not ActiveBasic.IsNothing(catchType)
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| 83 | Dim catchTypeName = catchType.FullName
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| 84 | If paramName = catchTypeName Then
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| 85 | isCatchable = True
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| 86 | Exit Function
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| 87 | End If
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| 88 | catchType = catchType.BaseType
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| 89 | Wend
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[411] | 90 | '*/
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[388] | 91 | End Function
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[58] | 92 | End Class
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| 93 |
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| 94 | Class ExceptionService
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| 95 | ppTryLayers As **TryLayer
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| 96 | nTryLayers As Long
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| 97 |
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| 98 | Sub FreeLocalObjects()
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| 99 | '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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| 100 | End Sub
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| 101 | Public
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| 102 |
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| 103 | Sub ExceptionService()
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| 104 | ppTryLayers = _System_malloc( 1 )
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| 105 | nTryLayers = 0
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| 106 | End Sub
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| 107 | Sub ~ExceptionService()
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| 108 | Dim i As Long
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| 109 | For i = 0 To ELM( nTryLayers )
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| 110 | Delete ppTryLayers[i]
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| 111 | Next
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| 112 | _System_free( ppTryLayers )
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| 113 | ppTryLayers = 0
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| 114 | End Sub
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| 115 |
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| 116 | 'Try
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[374] | 117 | Function _BeginTryScope( catchTable As *LONG_PTR, addressOfFinally As VoidPtr, basePtr As LONG_PTR, stackPtr As LONG_PTR ) As TryLayer
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[58] | 118 | ppTryLayers = _System_realloc( ppTryLayers, ( nTryLayers + 1 ) * SizeOf( *TryLayer ) )
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[374] | 119 | ppTryLayers[nTryLayers] = New TryLayer( catchTable, addressOfFinally, basePtr, stackPtr )
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[58] | 120 | nTryLayers++
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| 121 |
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[249] | 122 | Return ByVal ppTryLayers[nTryLayers-1]
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| 123 | End Function
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| 124 |
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[374] | 125 | Static Function BeginTryScope( catchTable As *LONG_PTR, addressOfFinally As VoidPtr, basePtr As LONG_PTR, stackPtr As LONG_PTR ) As TryLayer
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[411] | 126 | Return _System_pobj_AllThreads->GetCurrentException()._BeginTryScope( catchTable, addressOfFinally, basePtr, stackPtr )
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[373] | 127 | End Function
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| 128 |
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[58] | 129 | 'End Try
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| 130 | Sub EndTryScope()
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| 131 | nTryLayers--
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| 132 | Delete ppTryLayers[nTryLayers]
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| 133 | End Sub
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| 134 |
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| 135 | 'Throw
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[374] | 136 | Sub _Throw( ex As Object )
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[58] | 137 | If nTryLayers <= 0 then
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| 138 | '例外処理スコープ制御が無効なとき
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| 139 |
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| 140 | 'TODO: 適切なエラー処理
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[411] | 141 | MessageBox( NULL, ToTCStr(Ex"Catchされていない例外があります\r\n" + ex.ToString), NULL, MB_OK or MB_ICONEXCLAMATION )
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[388] | 142 | Debug
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[58] | 143 | Return
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| 144 | End If
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| 145 |
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[374] | 146 | ' スレッドへThrow処理を開始したことを通知
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[411] | 147 | Imports System.Threading
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[374] | 148 | Thread.CurrentThread().__Throw( ex )
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| 149 |
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[58] | 150 | '未解放なローカルオブジェクトを解放する
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| 151 | FreeLocalObjects()
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| 152 |
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[374] | 153 | Dim pTryLayer = ppTryLayers[nTryLayers - 1] As *TryLayer
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[58] | 154 |
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[374] | 155 | Dim addressOfCatch = pTryLayer->ResolveCatchesOverload( ex ) As LONG_PTR
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[375] | 156 | If addressOfCatch = NULL Then
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[374] | 157 | ' Catchが定義されていないときはFinallyへ誘導
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| 158 | addressOfCatch = pTryLayer->addressOfFinally As LONG_PTR
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| 159 | End If
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[58] | 160 |
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[374] | 161 |
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[58] | 162 | '--------------------------------------------------
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| 163 | ' スレッドのコンテキストを設定(Catchへ遷移する)
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| 164 | '--------------------------------------------------
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| 165 |
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[373] | 166 | Dim context As CONTEXT
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| 167 | context.ContextFlags = CONTEXT_CONTROL or CONTEXT_INTEGER
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| 168 | If GetThreadContext( GetCurrentThread(), context ) = 0 Then
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| 169 | ' TODO: エラー処理
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| 170 | debug
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| 171 | End If
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[372] | 172 |
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[373] | 173 | '新しいip, sp, bpをセット
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[58] | 174 | #ifdef _WIN64
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[374] | 175 | context.Rip = addressOfCatch As QWord
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| 176 | context.Rbp = pTryLayer->basePtr
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| 177 | context.Rsp = pTryLayer->stackPtr
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[58] | 178 | #else
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[374] | 179 | context.Eip = addressOfCatch As DWord
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| 180 | context.Ebp = pTryLayer->basePtr
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| 181 | context.Esp = pTryLayer->stackPtr
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[58] | 182 | #endif
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[249] | 183 |
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| 184 | #ifdef _DEBUG
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| 185 | Dim ThreadNum As Long
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| 186 | ThreadNum=_DebugSys_GetThread()
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| 187 | If ThreadNum <> -1 Then
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[374] | 188 | _DebugSys_ProcNum[ThreadNum] = pTryLayer->debugProcNum-1
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[249] | 189 | End If
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| 190 | #endif
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[373] | 191 |
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| 192 | If SetThreadContext( GetCurrentThread(), context ) = 0 Then
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[58] | 193 | OutputDebugString(Ex"レジスタ情報の設定に失敗しました。\r\n")
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| 194 | Return
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| 195 | End If
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| 196 | End Sub
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| 197 |
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[374] | 198 | Sub _ThrowWithParam( ex As Object )
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| 199 | _Throw( ex )
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[58] | 200 | End Sub
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[374] | 201 |
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| 202 | Sub _ThrowNoneParam()
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| 203 | _Throw( Nothing )
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| 204 | End Sub
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| 205 |
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| 206 | Sub FinishFinally()
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| 207 | Dim pTryLayer = ppTryLayers[nTryLayers - 1] As *TryLayer
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| 208 | pTryLayer->FinishFinally()
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| 209 | End Sub
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[58] | 210 | End Class
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| 211 |
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