Add support for HYBRID_MALLOC, allowing the use of gmalloc before

dumping and the system malloc after dumping.  (Bug#18222)

* configure.ac (HYBRID_MALLOC): New macro; define to use gmalloc
before dumping and the system malloc after dumping.  Define on Cygwin.
* src/conf_post.h (malloc, realloc, calloc, free) [HYBRID_MALLOC]:
Define as macros, expanding to hybrid_malloc, etc.
(HYBRID_GET_CURRENT_DIR_NAME): New macro.
(get_current_dir_name) [HYBRID_GET_CURRENT_DIR_NAME]: Define as
macro.
* src/gmalloc.c: Set up the infrastructure for HYBRID_MALLOC, with a
full implementation on Cygwin.  Remove Cygwin-specific code that
is no longer needed.
(malloc, realloc, calloc, free, aligned_alloc) [HYBRID_MALLOC]:
Redefine as macros expanding to gmalloc, grealloc, etc.
(DUMPED, ALLOCATED_BEFORE_DUMPING) [CYGWIN]: New macros.
(get_current_dir_name) [HYBRID_GET_CURRENT_DIR_NAME]: Undefine.
(USE_PTHREAD, posix_memalign) [HYBRID_MALLOC]: Don't define.
(hybrid_malloc, hybrid_calloc, hybrid_free, hybrid_realloc)
[HYBRID_MALLOC]:
(hybrid_get_current_dir_name) [HYBRID_GET_CURRENT_DIR_NAME]:
(hybrid_aligned_alloc) [HYBRID_MALLOC && (HAVE_ALIGNED_ALLOC ||
HAVE_POSIX_MEMALIGN)]: New functions.
* src/alloc.c (aligned_alloc) [HYBRID_MALLOC && (ALIGNED_ALLOC ||
HAVE_POSIX_MEMALIGN)]: Define as macro expanding to
hybrid_aligned_alloc; declare.
(USE_ALIGNED_ALLOC) [HYBRID_MALLOC && (ALIGNED_ALLOC ||
HAVE_POSIX_MEMALIGN)]: Define.
(refill_memory_reserve) [HYBRID_MALLOC]: Do nothing.
* src/sysdep.c (get_current_dir_name) [HYBRID_GET_CURRENT_DIR_NAME]:
Define as macro, expanding to gget_current_dir_name, and define
the latter.
* src/emacs.c (main) [HYBRID_MALLOC]: Don't call memory_warnings() or
malloc_enable_thread().  Don't initialize malloc.
* src/lisp.h (NONPOINTER_BITS) [CYGWIN]: Define (because GNU_MALLOC is
no longer defined on Cygwin).
(refill_memory_reserve) [HYBRID_MALLOC]: Don't declare.
* src/sheap.c (bss_sbrk_buffer_end): New variable.
* src/unexcw.c (__malloc_initialized): Remove variable.
* src/ralloc.c: Throughout, treat HYBRID_MALLOC the same as
SYSTEM_MALLOC.
* src/xdisp.c (decode_mode_spec) [HYBRID_MALLOC]: Don't check
	Vmemory_full.

1 files changed, 6 insertions, 6 deletions

diff --git a/src/ralloc.c b/src/ralloc.c
index c82cd4548d2..e63ed34c89b 100644
--- a/src/ralloc.c
+++ b/src/ralloc.c
@@ -35,9 +35,9 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define M_TOP_PAD           -2
 extern int mallopt (int, int);
 #else /* not DOUG_LEA_MALLOC */
-#ifndef SYSTEM_MALLOC
+#if !defined SYSTEM_MALLOC && !defined HYBRID_MALLOC
 extern size_t __malloc_extra_blocks;
-#endif /* SYSTEM_MALLOC */
+#endif /* not SYSTEM_MALLOC and not HYBRID_MALLOC */
 #endif /* not DOUG_LEA_MALLOC */
 
 #else /* not emacs */
@@ -95,7 +95,7 @@ static int extra_bytes;
 /* The hook `malloc' uses for the function which gets more space
    from the system.  */
 
-#ifndef SYSTEM_MALLOC
+#if !defined SYSTEM_MALLOC && !defined HYBRID_MALLOC
 extern void *(*__morecore) (ptrdiff_t);
 #endif
 
@@ -1179,7 +1179,7 @@ r_alloc_init (void)
   r_alloc_initialized = 1;
 
   page_size = PAGE;
-#ifndef SYSTEM_MALLOC
+#if !defined SYSTEM_MALLOC && !defined HYBRID_MALLOC
   real_morecore = __morecore;
   __morecore = r_alloc_sbrk;
 
@@ -1198,7 +1198,7 @@ r_alloc_init (void)
   mallopt (M_TOP_PAD, 64 * 4096);
   unblock_input ();
 #else
-#ifndef SYSTEM_MALLOC
+#if !defined SYSTEM_MALLOC && !defined HYBRID_MALLOC
   /* Give GNU malloc's morecore some hysteresis so that we move all
      the relocatable blocks much less often.  The number used to be
      64, but alloc.c would override that with 32 in code that was
@@ -1211,7 +1211,7 @@ r_alloc_init (void)
 #endif
 #endif
 
-#ifndef SYSTEM_MALLOC
+#if !defined SYSTEM_MALLOC && !defined HYBRID_MALLOC
   first_heap->end = (void *) PAGE_ROUNDUP (first_heap->start);
 
   /* The extra call to real_morecore guarantees that the end of the