[Git][ghc/ghc][master] rts: only collect live words in nonmoving census when non-concurrent

[Marge Bot (@marge-bot)]

Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC


Commits:
84357d11 by Teo Camarasu at 2024-02-21T05:01:11-05:00
rts: only collect live words in nonmoving census when non-concurrent

This avoids segfaults when the mutator modifies closures as we examine
them.

Resolves #24393

- - - - -


1 changed file:

- rts/sm/NonMoving.c


Changes:

=====================================
rts/sm/NonMoving.c
=====================================
@@ -1221,7 +1221,8 @@ concurrent_marking:
     traceConcSweepEnd();
 #if defined(DEBUG)
     if (RtsFlags.DebugFlags.nonmoving_gc)
-        nonmovingPrintAllocatorCensus(true);
+        // only collect live words if the mutator isn't running.
+        nonmovingPrintAllocatorCensus(!concurrent);
 #endif
 #if defined(TRACING)
     if (RtsFlags.TraceFlags.nonmoving_gc)



View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/84357d1143fe4f9076253160f78fac6c2acc8e5b

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/84357d1143fe4f9076253160f78fac6c2acc8e5b
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