>From a354736e1dfe5a7e4ddbb1ee7f1373be2b5bbe09 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 13 Aug 2019 12:11:35 -0700
Subject: [PATCH 1/3] Let consing_until_gc exceed INTPTR_MAX

Suggested by Eli Zaretskii (Bug#37006#46).
* src/alloc.c (consing_until_gc): Now of type consing_ct.
All uses changed, so gc-cons-threshold no longer saturates
against OBJECT_CT_MAX.
(object_ct): Move typedef here from lisp.h.
* src/lisp.h (consing_ct, CONSING_CT_MAX): New type and macro.
(OBJECT_CT_MAX): Remove.  Replace all uses with CONSING_CT_MAX.
---
 src/alloc.c | 21 ++++++++++-----------
 src/lisp.h  | 10 +++++++---
 2 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/src/alloc.c b/src/alloc.c
index c7419e2fa5..7bed3f4488 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -224,7 +224,7 @@ struct emacs_globals globals;
 
 /* maybe_gc collects garbage if this goes negative.  */
 
-object_ct consing_until_gc;
+consing_ct consing_until_gc;
 
 #ifdef HAVE_PDUMPER
 /* Number of finalizers run: used to loop over GC until we stop
@@ -236,9 +236,10 @@ int number_finalizers_run;
 
 bool gc_in_progress;
 
-/* System byte counts reported by GC.  */
+/* System byte and object counts reported by GC.  */
 
 typedef uintptr_t byte_ct;
+typedef intptr_t object_ct;
 
 /* Number of live and free conses etc.  */
 
@@ -2546,7 +2547,7 @@ free_cons (struct Lisp_Cons *ptr)
      might incorrectly return non-zero.  */
   int incr = sizeof *ptr;
   if (INT_ADD_WRAPV (consing_until_gc, incr, &consing_until_gc))
-    consing_until_gc = OBJECT_CT_MAX;
+    consing_until_gc = CONSING_CT_MAX;
   gcstat.total_free_conses++;
 }
 
@@ -5501,7 +5502,7 @@ staticpro (Lisp_Object const *varaddress)
 static void
 allow_garbage_collection (intmax_t consing)
 {
-  consing_until_gc = consing - (OBJECT_CT_MAX - consing_until_gc);
+  consing_until_gc = consing - (CONSING_CT_MAX - consing_until_gc);
   garbage_collection_inhibited--;
 }
 
@@ -5511,7 +5512,7 @@ inhibit_garbage_collection (void)
   ptrdiff_t count = SPECPDL_INDEX ();
   record_unwind_protect_intmax (allow_garbage_collection, consing_until_gc);
   garbage_collection_inhibited++;
-  consing_until_gc = OBJECT_CT_MAX;
+  consing_until_gc = CONSING_CT_MAX;
   return count;
 }
 
@@ -5817,7 +5818,7 @@ garbage_collect_1 (struct gcstat *gcst)
 
   /* In case user calls debug_print during GC,
      don't let that cause a recursive GC.  */
-  consing_until_gc = OBJECT_CT_MAX;
+  consing_until_gc = CONSING_CT_MAX;
 
   /* Save what's currently displayed in the echo area.  Don't do that
      if we are GC'ing because we've run out of memory, since
@@ -5932,19 +5933,17 @@ garbage_collect_1 (struct gcstat *gcst)
     consing_until_gc = memory_full_cons_threshold;
   else
     {
-      intptr_t threshold = min (max (GC_DEFAULT_THRESHOLD / 10,
-				     gc_cons_threshold),
-				OBJECT_CT_MAX);
+      consing_ct threshold = max (gc_cons_threshold, GC_DEFAULT_THRESHOLD / 10);
       if (FLOATP (Vgc_cons_percentage))
 	{
 	  double tot = (XFLOAT_DATA (Vgc_cons_percentage)
 			* total_bytes_of_live_objects ());
 	  if (threshold < tot)
 	    {
-	      if (tot < OBJECT_CT_MAX)
+	      if (tot < CONSING_CT_MAX)
 		threshold = tot;
 	      else
-		threshold = OBJECT_CT_MAX;
+		threshold = CONSING_CT_MAX;
 	    }
 	}
       consing_until_gc = threshold;
diff --git a/src/lisp.h b/src/lisp.h
index 63baab5d63..043f2f738e 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -3793,9 +3793,13 @@ extern void flush_stack_call_func (void (*func) (void *arg), void *arg);
 extern void garbage_collect (void);
 extern const char *pending_malloc_warning;
 extern Lisp_Object zero_vector;
-typedef intptr_t object_ct; /* Signed type of object counts reported by GC.  */
-#define OBJECT_CT_MAX INTPTR_MAX
-extern object_ct consing_until_gc;
+#define CONSING_CT_MAX max (INTPTR_MAX, EMACS_INT_MAX)
+#if CONSING_CT_MAX == INTPTR_MAX
+typedef intptr_t consing_ct;
+#else
+typedef EMACS_INT consing_ct;
+#endif
+extern consing_ct consing_until_gc;
 #ifdef HAVE_PDUMPER
 extern int number_finalizers_run;
 #endif
-- 
2.17.1