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Add SIGTERM handler #560

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Add SIGTERM handler #560

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1 change: 1 addition & 0 deletions package.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -157,6 +157,7 @@ executables:
- stm
- text
- transformers
- unix
ghc-options:
- -rtsopts
- -threaded
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22 changes: 22 additions & 0 deletions tools/booster/Server.hs
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Expand Up @@ -52,7 +52,9 @@ import Booster.SMT.Interface (SMTOptions (..))
import Booster.Syntax.ParsedKore (loadDefinition)
import Booster.Trace
import Booster.Util qualified as Booster
import Control.Concurrent (killThread, mkWeakThreadId, myThreadId)
import Data.Limit (Limit (..))
import GHC.Weak (deRefWeak)
import GlobalMain qualified
import Kore.Attribute.Symbol (StepperAttributes)
import Kore.BugReport (BugReportOption (..), withBugReport)
Expand Down Expand Up @@ -83,9 +85,29 @@ import Proxy (KoreServer (..), ProxyConfig (..))
import Proxy qualified
import SMT qualified as KoreSMT
import Stats qualified
import System.Posix.Signals qualified as Signals

{- | Workaround to ensure that the main thread throws an async exception on
receiving a SIGTERM signal.
based on https://github.com/IntersectMBO/cardano-node/pull/3641/files
-}
installSigTermHandler :: IO ()
installSigTermHandler = do
-- Similar implementation to the RTS's handling of SIGINT (see GHC's
-- https://gitlab.haskell.org/ghc/ghc/-/blob/master/libraries/base/GHC/TopHandler.hs).
runThreadIdWk <- mkWeakThreadId =<< myThreadId
void $
Signals.installHandler
Signals.sigTERM
( Signals.CatchOnce $ do
runThreadIdMay <- deRefWeak runThreadIdWk
forM_ runThreadIdMay killThread
)
Nothing

main :: IO ()
main = do
installSigTermHandler
startTime <- getTime Monotonic
options <- execParser clParser
let CLProxyOptions
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