private static void UnsubscribeFromBuildEvents(IVsTaskManager taskManager)
{
// unsubscribe from the VS task manager clear events
if (taskManager != null && clearTasksEvent != null)
{
try
{
taskManager.RemoveClearTasksEvent(clearTasksEvent);
}
catch { }
clearTasksEvent = null;
}
}
/// <summary>
/// This is called under the following cirumstances:
/// 1. Whenever solution update happens it is called with "buildStart" in angle brackets.
/// 2. Whenever a project is built, it is called with the project name
/// 3. If all projects are cleared (on rebuilds) it is called with an emtpyt string
/// 4. Whenever the solution build is done, it is called with "buildDone"
///
/// If we are running Clousot in a separate process, then we need to kill the process WHENEVER a build starts.
/// Otherwise, the build may fail due to locked files. The tasks that haven't been analyzed at that point are
/// saved away in a saved task list.
///
/// During the build, we get to clear certain projects from the queue (those that are rebuilt) and the saved task list.
/// Some of these will be added again by the build task executing. We can start processing these again as we get notified
/// only when all dependencies are ready.
///
/// At the end of the build "buildDone", we can put all saved tasks that weren't cleared back into the queue.
/// </summary>
/// <param name="taskManager"></param>
/// <param name="projectName"></param>
public void ivsTaskManager_OnClearTasks(IVsTaskManager taskManager, string projectName)
{
try
{
lock (backgroundTasks)
{
switch (projectName)
{
case "":
backgroundTasks.Clear();
savedTasks = null;
break;
case "<buildStart>":
var offset = 1; // save space for possible current task
savedTasks = new AnalysisTask[backgroundTasks.Count + offset];
backgroundTasks.CopyTo(savedTasks, offset);
backgroundTasks.Clear();
var currentTask = KillProc(taskManager);
if (currentTask != null) {
currentTask.process = null; // clear old process
savedTasks[0] = currentTask;
}
break;
case "<buildCancel>":
// make sure not to restart any tasks
backgroundTasks.Clear();
KillProc(taskManager); // for good measure
savedTasks = null;
break;
case "<buildFailed>":
// don't restart the tasks
backgroundTasks.Clear();
KillProc(taskManager);
savedTasks = null;
break;
case "<buildDone>":
// add saved tasks back on queue
if (savedTasks != null)
{
for (int i = 0; i < savedTasks.Length; i++)
{
var task = savedTasks[i];
if (task == null) continue;
if (task.process == null)
{
task.SetupProcess(); // reset the process to start again when build is done.
}
backgroundTasks.Enqueue(task);
}
savedTasks = null;
}
StartupBackgroundThreadIfNeeded();
break;
case "<release>":
KillProc(taskManager);
UnsubscribeFromBuildEvents(taskManager);
backgroundTasks.Clear();
savedTasks = null;
break;
default:
ClearProject(projectName);
break;
}
}
}
catch (Exception exn)
{
System.Diagnostics.Trace.WriteLine("Code contracts task manager exception:\n" + exn.ToString());
}
}
private static AnalysisTask KillProc(IVsTaskManager taskManager)
{
AnalysisTask result = null;
// kill current process
if (currentProcess != null)
{
try
{
if (!currentProcess.HasExited)
{
currentProcess.Kill();
result = currentTask;
}
}
catch (Exception exn)
{
System.Diagnostics.Trace.WriteLine("Code contracts: Task manager exception: kill process:\n" + exn.ToString());
}
finally
{
currentProcess = null;
currentTask = null;
}
}
return result;
}
public void Invoke(IVsTaskManager taskManager, string projectName)
{
task.ivsTaskManager_OnClearTasks(taskManager, projectName);
}