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[IM] Handle internal fatal error in BufferReadCallback #36187
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[IM] Handle internal fatal error in BufferReadCallback #36187
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PR #36187: Size comparison from 9ee0499 to 2167712 Full report (67 builds for bl602, bl702, bl702l, cc13x4_26x4, cc32xx, cyw30739, efr32, esp32, linux, nrfconnect, nxp, psoc6, qpg, stm32, telink, tizen)
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Revive #30965
Issue: If onError has been called from BufferedReadCallback when processing multiple attrbitues, potentially onError or onAttribute or onEvent could be called again from ReadClient, as a result, the behavior in application could be unexpected, crash is possible. note: the errors in BufferredReadCallback are treated as fatal ones.
Solution: In order to resolve the above issue, we introduce a new callback, CheckInternalError
We could set a flag in the buffered read callback that returns error for the next call from ReadClient, then we can call CheckInternalError after we handle onAttribute, and lead to a Error for ReadClient::Close and mpCallback.OnError, which also imply we can remove onError call inside BufferedReadCallback, and make sure onError should be called only with close path from readClient.