move hschooks.c to ghc/, and enable it

2 files changed, 42 insertions, 0 deletions

diff --git a/ghc/ghc.mk b/ghc/ghc.mk
index 46b2df5d57..e5cb843843 100644
--- a/ghc/ghc.mk
+++ b/ghc/ghc.mk
@@ -45,6 +45,10 @@ ghc_stage2_MODULES += GhciMonad GhciTags InteractiveUI
 endif
 ghc_stage3_MODULES = $(ghc_stage2_MODULES)
 
+ghc_stage1_C_SRCS = hschooks.c
+ghc_stage2_C_SRCS = hschooks.c
+ghc_stage3_C_SRCS = hschooks.c
+
 ghc_stage1_PROG = ghc-stage1$(exeext)
 ghc_stage2_PROG = ghc-stage2$(exeext)
 ghc_stage3_PROG = ghc-stage3$(exeext)
diff --git a/ghc/hschooks.c b/ghc/hschooks.c
new file mode 100644
index 0000000000..2224b0210e
--- /dev/null
+++ b/ghc/hschooks.c
@@ -0,0 +1,38 @@
+/*
+These routines customise the error messages
+for various bits of the RTS.  They are linked
+in instead of the defaults.
+*/
+
+#include "Rts.h"
+#if __GLASGOW_HASKELL__ <611
+#include "RtsFlags.h"
+#endif
+
+#include "HsFFI.h"
+
+#include <string.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+void
+defaultsHook (void)
+{
+    RtsFlags.GcFlags.heapSizeSuggestion = 6*1024*1024 / BLOCK_SIZE;
+    RtsFlags.GcFlags.maxStkSize         = 512*1024*1024 / sizeof(W_);
+    RtsFlags.GcFlags.giveStats = COLLECT_GC_STATS;
+    RtsFlags.GcFlags.statsFile = stderr;
+
+    // See #3408: the default idle GC time of 0.3s is too short on
+    // Windows where we receive console events once per second or so.
+    RtsFlags.GcFlags.idleGCDelayTime = 5*1000;
+}
+
+void
+StackOverflowHook (unsigned long stack_size)    /* in bytes */
+{
+    fprintf(stderr, "GHC stack-space overflow: current limit is %ld bytes.\nUse the `-K<size>' option to increase it.\n", stack_size);
+}
+