From 8ffe068c118086efd65974ad1fdacaaedd49504f Mon Sep 17 00:00:00 2001 From: frosch Date: Thu, 23 Apr 2015 20:07:07 +0000 Subject: (svn r27243) -Fix (r26816) [FS#6285]: Duplicate frees due to pool item classes not having copy constructors. --- src/saveload/engine_sl.cpp | 41 +++++++++++++++++++++++++++++++---------- 1 file changed, 31 insertions(+), 10 deletions(-) diff --git a/src/saveload/engine_sl.cpp b/src/saveload/engine_sl.cpp index df4aa37b9..a568fead7 100644 --- a/src/saveload/engine_sl.cpp +++ b/src/saveload/engine_sl.cpp @@ -48,21 +48,39 @@ static const SaveLoad _engine_desc[] = { SLE_END() }; -static std::vector _temp_engine; +static std::vector _temp_engine; + +/** + * Allocate an Engine structure, but not using the pools. + * The allocated Engine must be freed using FreeEngine; + * @return Allocated engine. + */ +static Engine* CallocEngine() +{ + uint8 *zero = CallocT(sizeof(Engine)); + Engine *engine = new (zero) Engine(); + return engine; +} + +/** + * Deallocate an Engine constructed by CallocEngine. + * @param e Engine to free. + */ +static void FreeEngine(Engine *e) +{ + if (e != NULL) { + e->~Engine(); + free(e); + } +} Engine *GetTempDataEngine(EngineID index) { if (index < _temp_engine.size()) { - return &_temp_engine[index]; + return _temp_engine[index]; } else if (index == _temp_engine.size()) { - uint8 zero[sizeof(Engine)]; - memset(zero, 0, sizeof(zero)); - Engine *engine = new (zero) Engine(); - - /* Adding 'engine' to the vector makes a shallow copy, so we do not want to destruct 'engine' */ - _temp_engine.push_back(*engine); - - return &_temp_engine[index]; + _temp_engine.push_back(CallocEngine()); + return _temp_engine[index]; } else { NOT_REACHED(); } @@ -127,6 +145,9 @@ void CopyTempEngineData() } /* Get rid of temporary data */ + for (std::vector::iterator it = _temp_engine.begin(); it != _temp_engine.end(); ++it) { + FreeEngine(*it); + } _temp_engine.clear(); } -- cgit v1.2.3-70-g09d2