ctest: Optionally terminate tests with a custom signal on timeout

CTest normally terminates test processes on timeout using `SIGKILL`.
Offer tests a chance to exit gracefully, on platforms supporting POSIX
signals, by setting `TIMEOUT_SIGNAL_{NAME,GRACE_PERIOD}` properties.

Fixes: #17288

1 files changed, 9 insertions, 0 deletions

diff --git a/Source/CTest/cmProcess.h b/Source/CTest/cmProcess.h
index c80922d..dc755eb 100644
--- a/Source/CTest/cmProcess.h
+++ b/Source/CTest/cmProcess.h
@@ -85,6 +85,14 @@ public:
     return std::move(this->Runner);
   }
 
+  enum class Termination
+  {
+    Normal,
+    Custom,
+    Forced,
+  };
+  Termination GetTerminationStyle() const { return this->TerminationStyle; }
+
 private:
   cm::optional<cmDuration> Timeout;
   TimeoutReason TimeoutReason_ = TimeoutReason::Normal;
@@ -137,4 +145,5 @@ private:
   std::vector<const char*> ProcessArgs;
   int Id;
   int64_t ExitValue;
+  Termination TerminationStyle = Termination::Normal;
 };