/* Declarations for `malloc' and friends.
- Copyright (C) 1990-1993, 1995-1996, 1999, 2002-2007, 2013-2015 Free
+ Copyright (C) 1990-1993, 1995-1996, 1999, 2002-2007, 2013-2016 Free
Software Foundation, Inc.
Written May 1989 by Mike Haertel.
#define USE_PTHREAD
#endif
+#include <stddef.h>
#include <string.h>
#include <limits.h>
#include <stdint.h>
-
-#ifdef HYBRID_GET_CURRENT_DIR_NAME
-#undef get_current_dir_name
-#endif
-
#include <unistd.h>
#ifdef USE_PTHREAD
#endif
#ifdef emacs
-extern void emacs_abort (void);
+# include "lisp.h"
+#endif
+
+#ifdef HAVE_MALLOC_H
+# if 4 < __GNUC__ + (2 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+# endif
+# include <malloc.h>
+#endif
+#ifndef __MALLOC_HOOK_VOLATILE
+# define __MALLOC_HOOK_VOLATILE volatile
+#endif
+#ifndef HAVE_MALLOC_H
+extern void (*__MALLOC_HOOK_VOLATILE __after_morecore_hook) (void);
+extern void (*__MALLOC_HOOK_VOLATILE __malloc_initialize_hook) (void);
+extern void *(*__morecore) (ptrdiff_t);
#endif
/* If HYBRID_MALLOC is defined, then temacs will use malloc,
however, will use the system malloc, realloc.... In other source
files, malloc, realloc... are renamed hybrid_malloc,
hybrid_realloc... via macros in conf_post.h. hybrid_malloc and
- friends are wrapper functions defined later in this file.
- aligned_alloc is defined as a macro only in alloc.c.
-
- As of this writing (August 2014), Cygwin is the only platform on
- which HYBRID_MACRO is defined. Any other platform that wants to
- define it will have to define the macros DUMPED and
- ALLOCATED_BEFORE_DUMPING, defined below for Cygwin. */
-#ifdef HYBRID_MALLOC
+ friends are wrapper functions defined later in this file. */
#undef malloc
#undef realloc
#undef calloc
+#undef aligned_alloc
#undef free
#define malloc gmalloc
#define realloc grealloc
#define calloc gcalloc
#define aligned_alloc galigned_alloc
#define free gfree
-#endif /* HYBRID_MALLOC */
-
-#ifdef CYGWIN
-extern void *bss_sbrk (ptrdiff_t size);
-extern int bss_sbrk_did_unexec;
-extern char bss_sbrk_buffer[];
-extern void *bss_sbrk_buffer_end;
-#define DUMPED bss_sbrk_did_unexec
-#define ALLOCATED_BEFORE_DUMPING(P) \
- ((P) < bss_sbrk_buffer_end && (P) >= (void *) bss_sbrk_buffer)
+#define malloc_info gmalloc_info
+
+#ifdef HYBRID_MALLOC
+# include "sheap.h"
+# define DUMPED bss_sbrk_did_unexec
+static bool
+ALLOCATED_BEFORE_DUMPING (char *p)
+{
+ return bss_sbrk_buffer <= p && p < bss_sbrk_buffer + STATIC_HEAP_SIZE;
+}
#endif
#ifdef __cplusplus
{
#endif
-#include <stddef.h>
-
+#ifdef HYBRID_MALLOC
+#define extern static
+#endif
/* Allocate SIZE bytes of memory. */
extern void *malloc (size_t size) ATTRIBUTE_MALLOC_SIZE ((1));
extern void *realloc (void *ptr, size_t size) ATTRIBUTE_ALLOC_SIZE ((2));
/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
extern void *calloc (size_t nmemb, size_t size) ATTRIBUTE_MALLOC_SIZE ((1,2));
-/* Free a block allocated by `malloc', `realloc' or `calloc'. */
+/* Free a block. */
extern void free (void *ptr);
/* Allocate SIZE bytes allocated to ALIGNMENT bytes. */
-#ifdef MSDOS
extern void *aligned_alloc (size_t, size_t);
+#ifdef MSDOS
extern void *memalign (size_t, size_t);
extern int posix_memalign (void **, size_t, size_t);
#endif
-#ifdef USE_PTHREAD
-/* Set up mutexes and make malloc etc. thread-safe. */
-extern void malloc_enable_thread (void);
-#endif
-
-#ifdef emacs
-extern void emacs_abort (void);
-#endif
-
/* The allocator divides the heap into blocks of fixed size; large
requests receive one or more whole blocks, and small requests
receive a fragment of a block. Fragment sizes are powers of two,
#define UNLOCK_ALIGNED_BLOCKS()
#endif
-/* Given an address in the middle of a malloc'd object,
- return the address of the beginning of the object. */
-extern void *malloc_find_object_address (void *ptr);
-
-/* Underlying allocation function; successive calls should
- return contiguous pieces of memory. */
-extern void *(*__morecore) (ptrdiff_t size);
-
-/* Default value of `__morecore'. */
-extern void *__default_morecore (ptrdiff_t size);
-
-/* If not NULL, this function is called after each time
- `__morecore' is called to increase the data size. */
-extern void (*__after_morecore_hook) (void);
-
-/* Number of extra blocks to get each time we ask for more core.
- This reduces the frequency of calling `(*__morecore)'. */
-extern size_t __malloc_extra_blocks;
-
/* Nonzero if `malloc' has been called and done its initialization. */
extern int __malloc_initialized;
/* Function called to initialize malloc data structures. */
extern int __malloc_initialize (void);
-/* Hooks for debugging versions. */
-extern void (*__malloc_initialize_hook) (void);
-extern void (*__free_hook) (void *ptr);
-extern void *(*__malloc_hook) (size_t size);
-extern void *(*__realloc_hook) (void *ptr, size_t size);
-extern void *(*__memalign_hook) (size_t size, size_t alignment);
+#ifdef GC_MCHECK
/* Return values for `mprobe': these are the kinds of inconsistencies that
`mcheck' enables detection of. */
/* Pick up the current statistics. */
extern struct mstats mstats (void);
-/* Call WARNFUN with a warning message when memory usage is high. */
-extern void memory_warnings (void *start, void (*warnfun) (const char *));
+#endif
+
+#undef extern
#ifdef __cplusplus
}
#include <errno.h>
-void *(*__morecore) (ptrdiff_t size) = __default_morecore;
+/* Debugging hook for 'malloc'. */
+static void *(*__MALLOC_HOOK_VOLATILE gmalloc_hook) (size_t);
-/* Debugging hook for `malloc'. */
-void *(*__malloc_hook) (size_t size);
+/* Replacements for traditional glibc malloc hooks, for platforms that
+ do not already have these hooks. Platforms with these hooks all
+ used relaxed ref/def, so it is OK to define them here too. */
+void (*__MALLOC_HOOK_VOLATILE __malloc_initialize_hook) (void);
+void (*__MALLOC_HOOK_VOLATILE __after_morecore_hook) (void);
+void *(*__morecore) (ptrdiff_t);
+
+#ifndef HYBRID_MALLOC
/* Pointer to the base of the first block. */
char *_heapbase;
/* Block information table. Allocated with align/__free (not malloc/free). */
malloc_info *_heapinfo;
-/* Number of info entries. */
-static size_t heapsize;
-
/* Search index in the info table. */
size_t _heapindex;
/* Are you experienced? */
int __malloc_initialized;
+#else
+
+static struct list _fraghead[BLOCKLOG];
+
+#endif /* HYBRID_MALLOC */
+
+/* Number of extra blocks to get each time we ask for more core.
+ This reduces the frequency of calling `(*__morecore)'. */
+#if defined DOUG_LEA_MALLOC || defined HYBRID_MALLOC || defined SYSTEM_MALLOC
+static
+#endif
size_t __malloc_extra_blocks;
-void (*__malloc_initialize_hook) (void);
-void (*__after_morecore_hook) (void);
+/* Number of info entries. */
+static size_t heapsize;
#if defined GC_MALLOC_CHECK && defined GC_PROTECT_MALLOC_STATE
if (!__malloc_initialized && !__malloc_initialize ())
return NULL;
- /* Copy the value of __malloc_hook to an automatic variable in case
- __malloc_hook is modified in another thread between its
+ /* Copy the value of gmalloc_hook to an automatic variable in case
+ gmalloc_hook is modified in another thread between its
NULL-check and the use.
Note: Strictly speaking, this is not a right solution. We should
use mutexes to access non-read-only variables that are shared
among multiple threads. We just leave it for compatibility with
- glibc malloc (i.e., assignments to __malloc_hook) for now. */
- hook = __malloc_hook;
+ glibc malloc (i.e., assignments to gmalloc_hook) for now. */
+ hook = gmalloc_hook;
return (hook != NULL ? *hook : _malloc_internal) (size);
}
\f
-#ifndef _LIBC
+#if !(defined (_LIBC) || defined (HYBRID_MALLOC))
/* On some ANSI C systems, some libc functions call _malloc, _free
and _realloc. Make them use the GNU functions. */
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
-
/* Debugging hook for free. */
-void (*__free_hook) (void *__ptr);
+static void (*__MALLOC_HOOK_VOLATILE gfree_hook) (void *);
+
+#ifndef HYBRID_MALLOC
/* List of blocks allocated by aligned_alloc. */
struct alignlist *_aligned_blocks = NULL;
+#endif
/* Return memory to the heap.
Like `_free_internal' but don't lock mutex. */
}
/* Return memory to the heap.
- Like `free' but don't call a __free_hook if there is one. */
+ Like 'free' but don't call a hook if there is one. */
void
_free_internal (void *ptr)
{
void
free (void *ptr)
{
- void (*hook) (void *) = __free_hook;
+ void (*hook) (void *) = gfree_hook;
if (hook != NULL)
(*hook) (ptr);
_free_internal (ptr);
}
+#ifndef HYBRID_MALLOC
/* Define the `cfree' alias for `free'. */
#ifdef weak_alias
weak_alias (free, cfree)
free (ptr);
}
#endif
+#endif
/* Change the size of a block allocated by `malloc'.
Copyright 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
Written May 1989 by Mike Haertel.
#endif
/* Debugging hook for realloc. */
-void *(*__realloc_hook) (void *ptr, size_t size);
+static void *(*grealloc_hook) (void *, size_t);
/* Resize the given region to the new size, returning a pointer
to the (possibly moved) region. This is optimized for speed;
if (!__malloc_initialized && !__malloc_initialize ())
return NULL;
- hook = __realloc_hook;
+ hook = grealloc_hook;
return (hook != NULL ? *hook : _realloc_internal) (ptr, size);
}
/* Copyright (C) 1991, 1992, 1994 Free Software Foundation, Inc.
/* Allocate INCREMENT more bytes of data space,
and return the start of data space, or NULL on errors.
If INCREMENT is negative, shrink data space. */
-void *
-__default_morecore (ptrdiff_t increment)
+static void *
+gdefault_morecore (ptrdiff_t increment)
{
void *result;
-#if defined (CYGWIN)
+#ifdef HYBRID_MALLOC
if (!DUMPED)
{
return bss_sbrk (increment);
return NULL;
return result;
}
+
+void *(*__morecore) (ptrdiff_t) = gdefault_morecore;
+
/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
You should have received a copy of the GNU General Public
License along with this library. If not, see <http://www.gnu.org/licenses/>. */
-void *(*__memalign_hook) (size_t size, size_t alignment);
-
void *
aligned_alloc (size_t alignment, size_t size)
{
void *result;
size_t adj, lastadj;
- void *(*hook) (size_t, size_t) = __memalign_hook;
-
- if (hook)
- return (*hook) (alignment, size);
/* Allocate a block with enough extra space to pad the block with up to
(ALIGNMENT - 1) bytes if necessary. */
return result;
}
+/* Note that memalign and posix_memalign are not used in Emacs. */
+#ifndef HYBRID_MALLOC
/* An obsolete alias for aligned_alloc, for any old libraries that use
this alias. */
/* If HYBRID_MALLOC is defined, we may want to use the system
posix_memalign below. */
-#ifndef HYBRID_MALLOC
int
posix_memalign (void **memptr, size_t alignment, size_t size)
{
The author may be reached (Email) at the address mike@ai.mit.edu,
or (US mail) as Mike Haertel c/o Free Software Foundation. */
+#ifndef HYBRID_MALLOC
+
+# ifndef HAVE_MALLOC_H
/* Allocate SIZE bytes on a page boundary. */
extern void *valloc (size_t);
+# endif
-#if defined _SC_PAGESIZE || !defined HAVE_GETPAGESIZE
-# include "getpagesize.h"
-#elif !defined getpagesize
+# if defined _SC_PAGESIZE || !defined HAVE_GETPAGESIZE
+# include "getpagesize.h"
+# elif !defined getpagesize
extern int getpagesize (void);
-#endif
+# endif
static size_t pagesize;
return aligned_alloc (pagesize, size);
}
+#endif /* HYBRID_MALLOC */
-#ifdef HYBRID_MALLOC
#undef malloc
#undef realloc
#undef calloc
#undef aligned_alloc
#undef free
+#ifdef HYBRID_MALLOC
/* Declare system malloc and friends. */
extern void *malloc (size_t size);
extern void *realloc (void *ptr, size_t size);
#endif
}
#endif
-
+
void *
hybrid_realloc (void *ptr, size_t size)
{
return result;
}
-#ifdef HYBRID_GET_CURRENT_DIR_NAME
-/* Defined in sysdep.c. */
-char *gget_current_dir_name (void);
+#else /* ! HYBRID_MALLOC */
-char *
-hybrid_get_current_dir_name (void)
+void *
+malloc (size_t size)
{
- if (DUMPED)
- return get_current_dir_name ();
- return gget_current_dir_name ();
+ return gmalloc (size);
+}
+
+void *
+calloc (size_t nmemb, size_t size)
+{
+ return gcalloc (nmemb, size);
+}
+
+void
+free (void *ptr)
+{
+ gfree (ptr);
+}
+
+void *
+aligned_alloc (size_t alignment, size_t size)
+{
+ return galigned_alloc (alignment, size);
+}
+
+void *
+realloc (void *ptr, size_t size)
+{
+ return grealloc (ptr, size);
}
-#endif
#endif /* HYBRID_MALLOC */
else
hdr = NULL;
- __free_hook = old_free_hook;
+ gfree_hook = old_free_hook;
free (hdr);
- __free_hook = freehook;
+ gfree_hook = freehook;
}
static void *
{
struct hdr *hdr;
- __malloc_hook = old_malloc_hook;
+ gmalloc_hook = old_malloc_hook;
hdr = malloc (sizeof *hdr + size + 1);
- __malloc_hook = mallochook;
+ gmalloc_hook = mallochook;
if (hdr == NULL)
return NULL;
memset ((char *) ptr + size, FREEFLOOD, osize - size);
}
- __free_hook = old_free_hook;
- __malloc_hook = old_malloc_hook;
- __realloc_hook = old_realloc_hook;
+ gfree_hook = old_free_hook;
+ gmalloc_hook = old_malloc_hook;
+ grealloc_hook = old_realloc_hook;
hdr = realloc (hdr, sizeof *hdr + size + 1);
- __free_hook = freehook;
- __malloc_hook = mallochook;
- __realloc_hook = reallochook;
+ gfree_hook = freehook;
+ gmalloc_hook = mallochook;
+ grealloc_hook = reallochook;
if (hdr == NULL)
return NULL;
/* These hooks may not be safely inserted if malloc is already in use. */
if (!__malloc_initialized && !mcheck_used)
{
- old_free_hook = __free_hook;
- __free_hook = freehook;
- old_malloc_hook = __malloc_hook;
- __malloc_hook = mallochook;
- old_realloc_hook = __realloc_hook;
- __realloc_hook = reallochook;
+ old_free_hook = gfree_hook;
+ gfree_hook = freehook;
+ old_malloc_hook = gmalloc_hook;
+ gmalloc_hook = mallochook;
+ old_realloc_hook = grealloc_hook;
+ grealloc_hook = reallochook;
mcheck_used = 1;
}