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CTest: make sure never to report negative test times (#14132) 

Because of clock scew between processors or just because of someone changing
the system time the end timestamp may be before the start time. Reporting a
negative time doesn't any sense, just report zero there as it already happens
for really fast tests.
This commit is contained in:
Rolf Eike Beer 2013-05-10 20:50:22 +02:00
parent cf4869ba08
commit e319e32b8c
1 changed files with 8 additions and 0 deletions
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8
Source/CTest/cmProcess.cxx
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@ -175,6 +175,14 @@ int cmProcess::GetNextOutputLine(std::string& line, double timeout)
// Record exit information.
this->ExitValue = cmsysProcess_GetExitValue(this->Process);
this->TotalTime = cmSystemTools::GetTime() - this->StartTime;
// Because of a processor clock scew the runtime may become slightly
// negative. If someone changed the system clock while the process was
// running this may be even more. Make sure not to report a negative
// duration here.
if (this->TotalTime <= 0.0)
{
this->TotalTime = 0.0;
}
// std::cerr << "Time to run: " << this->TotalTime << "\n";
return cmsysProcess_Pipe_None;
}