From 7851033dd687e826df82c1ec841480710468ce8c Mon Sep 17 00:00:00 2001 From: Pieter Wuille Date: Sun, 27 Jan 2013 01:24:06 +0100 Subject: [PATCH] Improve dealing with abort conditions --- src/main.cpp | 69 ++++++++++++++++++++++++++-------------------------- src/main.h | 10 ++++++-- 2 files changed, 42 insertions(+), 37 deletions(-) diff --git a/src/main.cpp b/src/main.cpp index 2b4acccb9e..82ef88b855 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -1687,7 +1687,7 @@ bool CBlock::ConnectBlock(CValidationState &state, CBlockIndex* pindex, CCoinsVi if (!FindUndoPos(state, pindex->nFile, pos, ::GetSerializeSize(blockundo, SER_DISK, CLIENT_VERSION) + 40)) return error("ConnectBlock() : FindUndoPos failed"); if (!blockundo.WriteToDisk(pos, pindex->pprev->GetBlockHash())) - return state.Error(error("ConnectBlock() : CBlockUndo::WriteToDisk failed")); + return state.Abort(_("Error: failed to write undo data")); // update nUndoPos in block index pindex->nUndoPos = pos.nPos; @@ -1698,16 +1698,15 @@ bool CBlock::ConnectBlock(CValidationState &state, CBlockIndex* pindex, CCoinsVi CDiskBlockIndex blockindex(pindex); if (!pblocktree->WriteBlockIndex(blockindex)) - return state.Error(error("ConnectBlock() : WriteBlockIndex failed")); + return state.Abort(_("Error: failed to write block index")); } if (fTxIndex) if (!pblocktree->WriteTxIndex(vPos)) - return state.Error(error("ConnectBlock() : WriteTxIndex failed")); + return state.Abort(_("Error: failed to write transaction index")); // add this block to the view's block chain - if (!view.SetBestBlock(pindex)) - return state.Error(); + assert(view.SetBestBlock(pindex)); // Watch for transactions paying to me for (unsigned int i=0; inHeight > pfork->nHeight) - if (!(plonger = plonger->pprev)) - return state.Error(error("SetBestChain() : plonger->pprev is null")); + while (plonger->nHeight > pfork->nHeight) { + plonger = plonger->pprev; + assert(plonger != NULL); + } if (pfork == plonger) break; - if (!(pfork = pfork->pprev)) - return state.Error(error("SetBestChain() : pfork->pprev is null")); + pfork = pfork->pprev; + assert(pfork != NULL); } // List of what to disconnect (typically nothing) @@ -1757,7 +1757,7 @@ bool SetBestChain(CValidationState &state, CBlockIndex* pindexNew) BOOST_FOREACH(CBlockIndex* pindex, vDisconnect) { CBlock block; if (!block.ReadFromDisk(pindex)) - return state.Error(error("SetBestBlock() : ReadFromDisk for disconnect failed")); + return state.Abort(_("Error: failed to read block")); int64 nStart = GetTimeMicros(); if (!block.DisconnectBlock(state, pindex, view)) return error("SetBestBlock() : DisconnectBlock %s failed", BlockHashStr(pindex->GetBlockHash()).c_str()); @@ -1777,7 +1777,7 @@ bool SetBestChain(CValidationState &state, CBlockIndex* pindexNew) BOOST_FOREACH(CBlockIndex *pindex, vConnect) { CBlock block; if (!block.ReadFromDisk(pindex)) - return state.Error(error("SetBestBlock() : ReadFromDisk for connect failed")); + return state.Abort(_("Error: failed to read block")); int64 nStart = GetTimeMicros(); if (!block.ConnectBlock(state, pindex, view)) { if (state.IsInvalid()) { @@ -1797,8 +1797,7 @@ bool SetBestChain(CValidationState &state, CBlockIndex* pindexNew) // Flush changes to global coin state int64 nStart = GetTimeMicros(); int nModified = view.GetCacheSize(); - if (!view.Flush()) - return state.Error(error("SetBestBlock() : unable to modify coin state")); + assert(view.Flush()); int64 nTime = GetTimeMicros() - nStart; if (fBenchmark) printf("- Flush %i transactions: %.2fms (%.4fms/tx)\n", nModified, 0.001 * nTime, 0.001 * nTime / nModified); @@ -1816,7 +1815,7 @@ bool SetBestChain(CValidationState &state, CBlockIndex* pindexNew) FlushBlockFile(); pblocktree->Sync(); if (!pcoinsTip->Flush()) - return state.Error(); + return state.Abort(_("Error: failed to write to coin database")); } // At this point, all changes have been done to the database. @@ -1903,8 +1902,7 @@ bool CBlock::AddToBlockIndex(CValidationState &state, const CDiskBlockPos &pos) // Construct new block index object CBlockIndex* pindexNew = new CBlockIndex(*this); - if (!pindexNew) - return state.Error(error("AddToBlockIndex() : new CBlockIndex failed")); + assert(pindexNew); map::iterator mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first; pindexNew->phashBlock = &((*mi).first); map::iterator miPrev = mapBlockIndex.find(hashPrevBlock); @@ -1923,7 +1921,7 @@ bool CBlock::AddToBlockIndex(CValidationState &state, const CDiskBlockPos &pos) setBlockIndexValid.insert(pindexNew); if (!pblocktree->WriteBlockIndex(CDiskBlockIndex(pindexNew))) - return state.Error(error("AddToBlockIndex() : writing block index failed")); + return state.Abort(_("Error: failed to write block index")); // New best? if (!ConnectBestBlock(state)) @@ -1938,7 +1936,7 @@ bool CBlock::AddToBlockIndex(CValidationState &state, const CDiskBlockPos &pos) } if (!pblocktree->Flush()) - return state.Error("AddToBlockIndex() : failed to sync block tree"); + return state.Abort(_("Error: failed to sync block index")); uiInterface.NotifyBlocksChanged(); return true; @@ -1987,12 +1985,12 @@ bool FindBlockPos(CValidationState &state, CDiskBlockPos &pos, unsigned int nAdd } } else - return state.Error(error("FindBlockPos() : out of disk space")); + return state.Error(); } } if (!pblocktree->WriteBlockFileInfo(nLastBlockFile, infoLastBlockFile)) - return state.Error(error("FindBlockPos() : cannot write updated block info")); + return state.Abort(_("Error: failed to write file info")); if (fUpdatedLast) pblocktree->WriteLastBlockFile(nLastBlockFile); @@ -2010,15 +2008,15 @@ bool FindUndoPos(CValidationState &state, int nFile, CDiskBlockPos &pos, unsigne pos.nPos = infoLastBlockFile.nUndoSize; nNewSize = (infoLastBlockFile.nUndoSize += nAddSize); if (!pblocktree->WriteBlockFileInfo(nLastBlockFile, infoLastBlockFile)) - return state.Error(error("FindUndoPos() : cannot write updated block info")); + return state.Abort(_("Error: failed to write block info")); } else { CBlockFileInfo info; if (!pblocktree->ReadBlockFileInfo(nFile, info)) - return state.Error(error("FindUndoPos() : cannot read block info")); + return state.Abort(_("Error: failed to read block info")); pos.nPos = info.nUndoSize; nNewSize = (info.nUndoSize += nAddSize); if (!pblocktree->WriteBlockFileInfo(nFile, info)) - return state.Error(error("FindUndoPos() : cannot write updated block info")); + return state.Abort(_("Error: failed to write block info")); } unsigned int nOldChunks = (pos.nPos + UNDOFILE_CHUNK_SIZE - 1) / UNDOFILE_CHUNK_SIZE; @@ -2033,7 +2031,7 @@ bool FindUndoPos(CValidationState &state, int nFile, CDiskBlockPos &pos, unsigne } } else - return state.Error(error("FindUndoPos() : out of disk space")); + return state.Error(); } return true; @@ -2164,7 +2162,7 @@ bool CBlock::AcceptBlock(CValidationState &state, CDiskBlockPos *dbp) return error("AcceptBlock() : FindBlockPos failed"); if (dbp == NULL) if (!WriteToDisk(blockPos)) - return state.Error(error("AcceptBlock() : WriteToDisk failed")); + return state.Abort(_("Error: failed to write block")); if (!AddToBlockIndex(state, blockPos)) return error("AcceptBlock() : AddToBlockIndex failed"); @@ -2430,6 +2428,14 @@ uint256 CPartialMerkleTree::ExtractMatches(std::vector &vMatch) { +bool AbortNode(const std::string &strMessage) { + fRequestShutdown = true; + strMiscWarning = strMessage; + printf("*** %s\n", strMessage.c_str()); + uiInterface.ThreadSafeMessageBox(strMessage, "", CClientUIInterface::MSG_ERROR); + StartShutdown(); + return false; +} bool CheckDiskSpace(uint64 nAdditionalBytes) { @@ -2437,15 +2443,8 @@ bool CheckDiskSpace(uint64 nAdditionalBytes) // Check for nMinDiskSpace bytes (currently 50MB) if (nFreeBytesAvailable < nMinDiskSpace + nAdditionalBytes) - { - fShutdown = true; - string strMessage = _("Error: Disk space is low!"); - strMiscWarning = strMessage; - printf("*** %s\n", strMessage.c_str()); - uiInterface.ThreadSafeMessageBox(strMessage, "", CClientUIInterface::MSG_ERROR); - StartShutdown(); - return false; - } + return AbortNode(_("Error: Disk space is low!")); + return true; } diff --git a/src/main.h b/src/main.h index 9c2029c9b7..8498fc2edd 100644 --- a/src/main.h +++ b/src/main.h @@ -181,6 +181,8 @@ bool ConnectBestBlock(CValidationState &state); CBlockIndex * InsertBlockIndex(uint256 hash); /** Verify a signature */ bool VerifySignature(const CCoins& txFrom, const CTransaction& txTo, unsigned int nIn, unsigned int flags, int nHashType); +/** Abort with a message */ +bool AbortNode(const std::string &msg); @@ -1886,9 +1888,13 @@ public: bool Invalid(bool ret = false) { return DoS(0, ret); } - bool Error(bool ret = false) { + bool Error() { mode = MODE_ERROR; - return ret; + return false; + } + bool Abort(const std::string &msg) { + AbortNode(msg); + return Error(); } bool IsValid() { return mode == MODE_VALID;