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Fix a crash caused by invalid iterator (thanks to Michael Steinberg) 

TOOL_MANAGER::finishTool() caused iterator to become invalid when an element was removed from the m_activeTools deque.
This commit is contained in:
Maciej Suminski 2016-07-04 16:12:21 +02:00
parent 4a20f376a3
commit 33e7fe6211
2 changed files with 23 additions and 6 deletions
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24
common/tool/tool_manager.cpp
View File

@ -489,9 +489,11 @@ optional<TOOL_EVENT> TOOL_MANAGER::ScheduleWait( TOOL_BASE* aTool,
void TOOL_MANAGER::dispatchInternal( const TOOL_EVENT& aEvent )
{
// iterate over all registered tools
for( TOOL_ID toolId : m_activeTools )
for( auto it = m_activeTools.begin(); it != m_activeTools.end(); /* iteration is done inside */)
{
TOOL_STATE* st = m_toolIdIndex[toolId];
auto curIt = it;
TOOL_STATE* st = m_toolIdIndex[*it];
++it; // it might be overwritten, if the tool is removed the m_activeTools deque
// the tool state handler is waiting for events (i.e. called Wait() method)
if( st->pendingWait )
@ -507,7 +509,10 @@ void TOOL_MANAGER::dispatchInternal( const TOOL_EVENT& aEvent )
st->waitEvents.clear();
if( st->cofunc && !st->cofunc->Resume() )
finishTool( st ); // The couroutine has finished
{
if( finishTool( st, false ) ) // The couroutine has finished
it = m_activeTools.erase( curIt );
}
// If the tool did not request to propagate
// the event to other tools, we should stop it now
@ -635,8 +640,10 @@ void TOOL_MANAGER::dispatchContextMenu( const TOOL_EVENT& aEvent )
}
void TOOL_MANAGER::finishTool( TOOL_STATE* aState )
bool TOOL_MANAGER::finishTool( TOOL_STATE* aState, bool aDeactivate )
{
bool shouldDeactivate = false;
// Reset VIEW_CONTROLS only if the most recent tool is finished
if( m_activeTools.empty() || m_activeTools.front() == aState->theTool->GetId() )
m_viewControls->Reset();
@ -648,10 +655,17 @@ void TOOL_MANAGER::finishTool( TOOL_STATE* aState )
aState->theTool->GetId() );
if( tool != m_activeTools.end() )
m_activeTools.erase( tool );
{
shouldDeactivate = true;
if( aDeactivate )
m_activeTools.erase( tool );
}
}
aState->theTool->SetTransitions();
return shouldDeactivate;
}

5
include/tool/tool_manager.h
View File

@ -390,8 +390,11 @@ private:
* Deactivates a tool and does the necessary clean up.
*
* @param aState is the state variable of the tool to be stopped.
* @param aDeactivate decides if the tool should be removed from the active tools set.
* @return True if the tool should be deactivated (note it does not necessarily mean it has
* been deactivated, aDeactivate parameter decides).
*/
void finishTool( TOOL_STATE* aState );
bool finishTool( TOOL_STATE* aState, bool aDeactivate = true );
/**
* Function isRegistered()