rts: Print correct stack size on stack overflow

This requires that stackOverflow() in RtsUtils.c be passed a reference
to the current TSO. This requires a small change in libraries/base.

includes/Rts.h

@@ -250,7 +250,7 @@ void getWin32ProgArgv(int *argc, wchar_t **argv[]);
 void setWin32ProgArgv(int argc, wchar_t *argv[]);
 #endif
 
-void stackOverflow(void);
+void stackOverflow(StgTSO* tso);
 
 void stg_exit(int n) GNU_ATTRIBUTE(__noreturn__);
 

rts/RtsUtils.c

@@ -114,12 +114,12 @@ stgFree(void* p)
    -------------------------------------------------------------------------- */
 
 void
-stackOverflow(void)
+stackOverflow(StgTSO* tso)
 {
-  StackOverflowHook(RtsFlags.GcFlags.maxStkSize * sizeof(W_));
+    StackOverflowHook(tso->tot_stack_size * sizeof(W_));
 
 #if defined(TICKY_TICKY)
-  if (RtsFlags.TickyFlags.showTickyStats) PrintTickyInfo();
+    if (RtsFlags.TickyFlags.showTickyStats) PrintTickyInfo();
 #endif
 }