Fix Trac #4841: behave right with TypeSynonymInstances and NoFlexibleInstances

[ghc-hetmet.git] / rts / Schedule.c

diff --git a/rts/Schedule.c b/rts/Schedule.c
index 51f8e75..0b1dec4 100644 (file)
--- a/rts/Schedule.c
+++ b/rts/Schedule.c
@@ -56,6 +56,9 @@
 #include <errno.h>
 #endif
 
+#ifdef TRACING
+#include "eventlog/EventLog.h"
+#endif
 /* -----------------------------------------------------------------------------
  * Global variables
  * -------------------------------------------------------------------------- */
@@ -1022,6 +1025,10 @@ scheduleHandleHeapOverflow( Capability *cap, StgTSO *t )
        
        blocks = (lnat)BLOCK_ROUND_UP(cap->r.rHpAlloc) / BLOCK_SIZE;
        
+        if (blocks > BLOCKS_PER_MBLOCK) {
+            barf("allocation of %ld bytes too large (GHC should have complained at compile-time)", (long)cap->r.rHpAlloc);
+        }
+
        debugTrace(DEBUG_sched,
                   "--<< thread %ld (%s) stopped: requesting a large block (size %ld)\n", 
                   (long)t->id, what_next_strs[t->what_next], blocks);
@@ -1533,6 +1540,10 @@ forkProcess(HsStablePtr *entry
 
     stopTimer(); // See #4074
 
+#if defined(TRACING)
+    flushEventLog(); // so that child won't inherit dirty file buffers
+#endif
+
     pid = fork();
     
     if (pid) { // parent
@@ -1555,7 +1566,11 @@ forkProcess(HsStablePtr *entry
         initMutex(&cap->running_task->lock);
 #endif
 
-       // Now, all OS threads except the thread that forked are
+#ifdef TRACING
+        resetTracing();
+#endif
+
+        // Now, all OS threads except the thread that forked are
        // stopped.  We need to stop all Haskell threads, including
        // those involved in foreign calls.  Also we need to delete
        // all Tasks, because they correspond to OS threads that are