From 5c2e6bced838b7d7617af2bfb272889a9af16a76 Mon Sep 17 00:00:00 2001
From: Ben Gamari <ben@smart-cactus.org>
Date: Sat, 24 Oct 2020 19:51:15 -0400
Subject: rts: Tear down stats_mutex after exitHeapProfiling

Since the latter wants to call getRTSStats.
---
 rts/RtsStartup.c |  4 ++++
 rts/Stats.c      | 12 ++++++++----
 rts/Stats.h      |  1 +
 rts/sm/Storage.c |  2 +-
 4 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/rts/RtsStartup.c b/rts/RtsStartup.c
index a3dddb03f5..a20dc3d04a 100644
--- a/rts/RtsStartup.c
+++ b/rts/RtsStartup.c
@@ -575,6 +575,10 @@ hs_exit_(bool wait_foreign)
    if (is_io_mng_native_p())
       hs_restoreConsoleCP();
 #endif
+
+    /* tear down statistics subsystem */
+    stat_exit();
+
     /* free hash table storage */
     exitHashTable();
 
diff --git a/rts/Stats.c b/rts/Stats.c
index 44cf83e901..71dcf8a9d0 100644
--- a/rts/Stats.c
+++ b/rts/Stats.c
@@ -1245,7 +1245,7 @@ static void report_one_line(const RTSSummaryStats * sum)
 }
 
 void
-stat_exit (void)
+stat_exitReport (void)
 {
     RTSSummaryStats sum;
     init_RTSSummaryStats(&sum);
@@ -1450,9 +1450,6 @@ stat_exit (void)
             }
         }
         RELEASE_LOCK(&stats_mutex);
-#if defined(THREADED_RTS)
-        closeMutex(&stats_mutex);
-#endif
 
         statsFlush();
         statsClose();
@@ -1476,6 +1473,13 @@ stat_exit (void)
     RELEASE_LOCK(&all_tasks_mutex);
 }
 
+void stat_exit()
+{
+#if defined(THREADED_RTS)
+        closeMutex(&stats_mutex);
+#endif
+}
+
 /* Note [Work Balance]
 ----------------------
 Work balance is a measure of how evenly the work done during parallel garbage
diff --git a/rts/Stats.h b/rts/Stats.h
index 103564a82a..9d62acef37 100644
--- a/rts/Stats.h
+++ b/rts/Stats.h
@@ -58,6 +58,7 @@ void      stat_endHeapCensus(void);
 void      stat_startExit(void);
 void      stat_endExit(void);
 
+void      stat_exitReport(void);
 void      stat_exit(void);
 void      stat_workerStop(void);
 
diff --git a/rts/sm/Storage.c b/rts/sm/Storage.c
index 96bc133d02..c8c07db737 100644
--- a/rts/sm/Storage.c
+++ b/rts/sm/Storage.c
@@ -302,7 +302,7 @@ exitStorage (void)
 {
     nonmovingExit();
     updateNurseriesStats();
-    stat_exit();
+    stat_exitReport();
 }
 
 void
-- 
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