~ chicken-core (chicken-5) 0879e31f6181bfe87484ffbbec90b38bf9f728cd

commit 0879e31f6181bfe87484ffbbec90b38bf9f728cd
Author:     dieggsy <dieggsy@pm.me>
AuthorDate: Sat Apr 10 13:36:18 2021 -0400
Commit:     Mario Domenech Goulart <mario@parenteses.org>
CommitDate: Thu May 20 21:26:07 2021 +0200

    Increase maximum heap size on 64-bit machines
    
    Signed-off-by: Peter Bex <peter@more-magic.net>
    Signed-off-by: Mario Domenech Goulart <mario@parenteses.org>

diff --git a/NEWS b/NEWS
index 7f9faecd..7c20c0a0 100644
--- a/NEWS
+++ b/NEWS
@@ -35,6 +35,9 @@
     contributed by Sebastien Marie)
   - A feature corresponding to the word size is available
     regardless of the word size (#1693)
+  - The default maximum heap size on 64-bit platforms is now the
+    theoretical maximum addressable memory size (#1675).  Use -:m
+    if you would like to override this at run-time.
   - Deprecated C_(a_i_current_)milliseconds in favor of
     C_(a_i_)current_process_milliseconds to match the Scheme-level
     deprecation of current-milliseconds.
diff --git a/runtime.c b/runtime.c
index 51cfa7be..dfc2e0ee 100644
--- a/runtime.c
+++ b/runtime.c
@@ -150,8 +150,10 @@ static C_TLS int timezone;
 
 #ifdef C_SIXTY_FOUR
 # define DEFAULT_STACK_SIZE            (1024 * 1024)
+# define DEFAULT_MAXIMAL_HEAP_SIZE     0x7ffffffffffffff0
 #else
 # define DEFAULT_STACK_SIZE            (256 * 1024)
+# define DEFAULT_MAXIMAL_HEAP_SIZE     0x7ffffff0
 #endif
 
 #define DEFAULT_SYMBOL_TABLE_SIZE      2999
@@ -159,7 +161,6 @@ static C_TLS int timezone;
 #define DEFAULT_HEAP_SIZE              DEFAULT_STACK_SIZE
 #define MINIMAL_HEAP_SIZE              DEFAULT_STACK_SIZE
 #define DEFAULT_SCRATCH_SPACE_SIZE     256
-#define DEFAULT_MAXIMAL_HEAP_SIZE      0x7ffffff0
 #define DEFAULT_HEAP_GROWTH            200
 #define DEFAULT_HEAP_SHRINKAGE         50
 #define DEFAULT_HEAP_SHRINKAGE_USED    25