LuaJIT 2.0.3

git-svn-id: svn://tug.org/texlive/trunk@33172 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 0 insertions, 1389 deletions

diff --git a/Build/source/libs/luajit/LuaJIT-2.0.2/src/lj_alloc.c b/Build/source/libs/luajit/LuaJIT-2.0.2/src/lj_alloc.c
deleted file mode 100644
index 93bf5a6e171..00000000000
--- a/Build/source/libs/luajit/LuaJIT-2.0.2/src/lj_alloc.c
+++ /dev/null
@@ -1,1389 +0,0 @@
-/*
-** Bundled memory allocator.
-**
-** Beware: this is a HEAVILY CUSTOMIZED version of dlmalloc.
-** The original bears the following remark:
-**
-**   This is a version (aka dlmalloc) of malloc/free/realloc written by
-**   Doug Lea and released to the public domain, as explained at
-**   http://creativecommons.org/licenses/publicdomain.
-**
-**   * Version pre-2.8.4 Wed Mar 29 19:46:29 2006    (dl at gee)
-**
-** No additional copyright is claimed over the customizations.
-** Please do NOT bother the original author about this version here!
-**
-** If you want to use dlmalloc in another project, you should get
-** the original from: ftp://gee.cs.oswego.edu/pub/misc/
-** For thread-safe derivatives, take a look at:
-** - ptmalloc: http://www.malloc.de/
-** - nedmalloc: http://www.nedprod.com/programs/portable/nedmalloc/
-*/
-
-#define lj_alloc_c
-#define LUA_CORE
-
-/* To get the mremap prototype. Must be defined before any system includes. */
-#if defined(__linux__) && !defined(_GNU_SOURCE)
-#define _GNU_SOURCE
-#endif
-
-#include "lj_def.h"
-#include "lj_arch.h"
-#include "lj_alloc.h"
-
-#ifndef LUAJIT_USE_SYSMALLOC
-
-#define MAX_SIZE_T		(~(size_t)0)
-#define MALLOC_ALIGNMENT	((size_t)8U)
-
-#define DEFAULT_GRANULARITY	((size_t)128U * (size_t)1024U)
-#define DEFAULT_TRIM_THRESHOLD	((size_t)2U * (size_t)1024U * (size_t)1024U)
-#define DEFAULT_MMAP_THRESHOLD	((size_t)128U * (size_t)1024U)
-#define MAX_RELEASE_CHECK_RATE	255
-
-/* ------------------- size_t and alignment properties -------------------- */
-
-/* The byte and bit size of a size_t */
-#define SIZE_T_SIZE		(sizeof(size_t))
-#define SIZE_T_BITSIZE		(sizeof(size_t) << 3)
-
-/* Some constants coerced to size_t */
-/* Annoying but necessary to avoid errors on some platforms */
-#define SIZE_T_ZERO		((size_t)0)
-#define SIZE_T_ONE		((size_t)1)
-#define SIZE_T_TWO		((size_t)2)
-#define TWO_SIZE_T_SIZES	(SIZE_T_SIZE<<1)
-#define FOUR_SIZE_T_SIZES	(SIZE_T_SIZE<<2)
-#define SIX_SIZE_T_SIZES	(FOUR_SIZE_T_SIZES+TWO_SIZE_T_SIZES)
-
-/* The bit mask value corresponding to MALLOC_ALIGNMENT */
-#define CHUNK_ALIGN_MASK	(MALLOC_ALIGNMENT - SIZE_T_ONE)
-
-/* the number of bytes to offset an address to align it */
-#define align_offset(A)\
- ((((size_t)(A) & CHUNK_ALIGN_MASK) == 0)? 0 :\
-  ((MALLOC_ALIGNMENT - ((size_t)(A) & CHUNK_ALIGN_MASK)) & CHUNK_ALIGN_MASK))
-
-/* -------------------------- MMAP support ------------------------------- */
-
-#define MFAIL			((void *)(MAX_SIZE_T))
-#define CMFAIL			((char *)(MFAIL)) /* defined for convenience */
-
-#define IS_DIRECT_BIT		(SIZE_T_ONE)
-
-#if LJ_TARGET_WINDOWS
-
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h>
-
-#if LJ_64
-
-/* Undocumented, but hey, that's what we all love so much about Windows. */
-typedef long (*PNTAVM)(HANDLE handle, void **addr, ULONG zbits,
-		       size_t *size, ULONG alloctype, ULONG prot);
-static PNTAVM ntavm;
-
-/* Number of top bits of the lower 32 bits of an address that must be zero.
-** Apparently 0 gives us full 64 bit addresses and 1 gives us the lower 2GB.
-*/
-#define NTAVM_ZEROBITS		1
-
-static void INIT_MMAP(void)
-{
-  ntavm = (PNTAVM)GetProcAddress(GetModuleHandleA("ntdll.dll"),
-				 "NtAllocateVirtualMemory");
-}
-
-/* Win64 32 bit MMAP via NtAllocateVirtualMemory. */
-static LJ_AINLINE void *CALL_MMAP(size_t size)
-{
-  DWORD olderr = GetLastError();
-  void *ptr = NULL;
-  long st = ntavm(INVALID_HANDLE_VALUE, &ptr, NTAVM_ZEROBITS, &size,
-		  MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE);
-  SetLastError(olderr);
-  return st == 0 ? ptr : MFAIL;
-}
-
-/* For direct MMAP, use MEM_TOP_DOWN to minimize interference */
-static LJ_AINLINE void *DIRECT_MMAP(size_t size)
-{
-  DWORD olderr = GetLastError();
-  void *ptr = NULL;
-  long st = ntavm(INVALID_HANDLE_VALUE, &ptr, NTAVM_ZEROBITS, &size,
-		  MEM_RESERVE|MEM_COMMIT|MEM_TOP_DOWN, PAGE_READWRITE);
-  SetLastError(olderr);
-  return st == 0 ? ptr : MFAIL;
-}
-
-#else
-
-#define INIT_MMAP()		((void)0)
-
-/* Win32 MMAP via VirtualAlloc */
-static LJ_AINLINE void *CALL_MMAP(size_t size)
-{
-  DWORD olderr = GetLastError();
-  void *ptr = VirtualAlloc(0, size, MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE);
-  SetLastError(olderr);
-  return ptr ? ptr : MFAIL;
-}
-
-/* For direct MMAP, use MEM_TOP_DOWN to minimize interference */
-static LJ_AINLINE void *DIRECT_MMAP(size_t size)
-{
-  DWORD olderr = GetLastError();
-  void *ptr = VirtualAlloc(0, size, MEM_RESERVE|MEM_COMMIT|MEM_TOP_DOWN,
-			   PAGE_READWRITE);
-  SetLastError(olderr);
-  return ptr ? ptr : MFAIL;
-}
-
-#endif
-
-/* This function supports releasing coalesed segments */
-static LJ_AINLINE int CALL_MUNMAP(void *ptr, size_t size)
-{
-  DWORD olderr = GetLastError();
-  MEMORY_BASIC_INFORMATION minfo;
-  char *cptr = (char *)ptr;
-  while (size) {
-    if (VirtualQuery(cptr, &minfo, sizeof(minfo)) == 0)
-      return -1;
-    if (minfo.BaseAddress != cptr || minfo.AllocationBase != cptr ||
-	minfo.State != MEM_COMMIT || minfo.RegionSize > size)
-      return -1;
-    if (VirtualFree(cptr, 0, MEM_RELEASE) == 0)
-      return -1;
-    cptr += minfo.RegionSize;
-    size -= minfo.RegionSize;
-  }
-  SetLastError(olderr);
-  return 0;
-}
-
-#else
-
-#include <errno.h>
-#include <sys/mman.h>
-
-#define MMAP_PROT		(PROT_READ|PROT_WRITE)
-#if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
-#define MAP_ANONYMOUS		MAP_ANON
-#endif
-#define MMAP_FLAGS		(MAP_PRIVATE|MAP_ANONYMOUS)
-
-#if LJ_64
-/* 64 bit mode needs special support for allocating memory in the lower 2GB. */
-
-#if LJ_TARGET_LINUX
-
-/* Actually this only gives us max. 1GB in current Linux kernels. */
-static LJ_AINLINE void *CALL_MMAP(size_t size)
-{
-  int olderr = errno;
-  void *ptr = mmap(NULL, size, MMAP_PROT, MAP_32BIT|MMAP_FLAGS, -1, 0);
-  errno = olderr;
-  return ptr;
-}
-
-#elif LJ_TARGET_OSX || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-      defined(__NetBSD__) || defined(__OpenBSD__) || defined(__sun__)
-
-/* OSX and FreeBSD mmap() use a naive first-fit linear search.
-** That's perfect for us. Except that -pagezero_size must be set for OSX,
-** otherwise the lower 4GB are blocked. And the 32GB RLIMIT_DATA needs
-** to be reduced to 250MB on FreeBSD.
-*/
-#if LJ_TARGET_OSX
-#define MMAP_REGION_START	((uintptr_t)0x10000)
-#else
-#define MMAP_REGION_START	((uintptr_t)0x10000000)
-#endif
-#define MMAP_REGION_END		((uintptr_t)0x80000000)
-
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
-#include <sys/resource.h>
-#endif
-
-static LJ_AINLINE void *CALL_MMAP(size_t size)
-{
-  int olderr = errno;
-  /* Hint for next allocation. Doesn't need to be thread-safe. */
-  static uintptr_t alloc_hint = MMAP_REGION_START;
-  int retry = 0;
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
-  static int rlimit_modified = 0;
-  if (LJ_UNLIKELY(rlimit_modified == 0)) {
-    struct rlimit rlim;
-    rlim.rlim_cur = rlim.rlim_max = MMAP_REGION_START;
-    setrlimit(RLIMIT_DATA, &rlim);  /* Ignore result. May fail below. */
-    rlimit_modified = 1;
-  }
-#endif
-  for (;;) {
-    void *p = mmap((void *)alloc_hint, size, MMAP_PROT, MMAP_FLAGS, -1, 0);
-    if ((uintptr_t)p >= MMAP_REGION_START &&
-	(uintptr_t)p + size < MMAP_REGION_END) {
-      alloc_hint = (uintptr_t)p + size;
-      errno = olderr;
-      return p;
-    }
-    if (p != CMFAIL) munmap(p, size);
-#ifdef __sun__
-    alloc_hint += 0x1000000;  /* Need near-exhaustive linear scan. */
-    if (alloc_hint + size < MMAP_REGION_END) continue;
-#endif
-    if (retry) break;
-    retry = 1;
-    alloc_hint = MMAP_REGION_START;
-  }
-  errno = olderr;
-  return CMFAIL;
-}
-
-#else
-
-#error "NYI: need an equivalent of MAP_32BIT for this 64 bit OS"
-
-#endif
-
-#else
-
-/* 32 bit mode is easy. */
-static LJ_AINLINE void *CALL_MMAP(size_t size)
-{
-  int olderr = errno;
-  void *ptr = mmap(NULL, size, MMAP_PROT, MMAP_FLAGS, -1, 0);
-  errno = olderr;
-  return ptr;
-}
-
-#endif
-
-#define INIT_MMAP()		((void)0)
-#define DIRECT_MMAP(s)		CALL_MMAP(s)
-
-static LJ_AINLINE int CALL_MUNMAP(void *ptr, size_t size)
-{
-  int olderr = errno;
-  int ret = munmap(ptr, size);
-  errno = olderr;
-  return ret;
-}
-
-#if LJ_TARGET_LINUX
-/* Need to define _GNU_SOURCE to get the mremap prototype. */
-static LJ_AINLINE void *CALL_MREMAP_(void *ptr, size_t osz, size_t nsz,
-				     int flags)
-{
-  int olderr = errno;
-  ptr = mremap(ptr, osz, nsz, flags);
-  errno = olderr;
-  return ptr;
-}
-
-#define CALL_MREMAP(addr, osz, nsz, mv) CALL_MREMAP_((addr), (osz), (nsz), (mv))
-#define CALL_MREMAP_NOMOVE	0
-#define CALL_MREMAP_MAYMOVE	1
-#if LJ_64
-#define CALL_MREMAP_MV		CALL_MREMAP_NOMOVE
-#else
-#define CALL_MREMAP_MV		CALL_MREMAP_MAYMOVE
-#endif
-#endif
-
-#endif
-
-#ifndef CALL_MREMAP
-#define CALL_MREMAP(addr, osz, nsz, mv) ((void)osz, MFAIL)
-#endif
-
-/* -----------------------  Chunk representations ------------------------ */
-
-struct malloc_chunk {
-  size_t               prev_foot;  /* Size of previous chunk (if free).  */
-  size_t               head;       /* Size and inuse bits. */
-  struct malloc_chunk *fd;         /* double links -- used only if free. */
-  struct malloc_chunk *bk;
-};
-
-typedef struct malloc_chunk  mchunk;
-typedef struct malloc_chunk *mchunkptr;
-typedef struct malloc_chunk *sbinptr;  /* The type of bins of chunks */
-typedef size_t bindex_t;               /* Described below */
-typedef unsigned int binmap_t;         /* Described below */
-typedef unsigned int flag_t;           /* The type of various bit flag sets */
-
-/* ------------------- Chunks sizes and alignments ----------------------- */
-
-#define MCHUNK_SIZE		(sizeof(mchunk))
-
-#define CHUNK_OVERHEAD		(SIZE_T_SIZE)
-
-/* Direct chunks need a second word of overhead ... */
-#define DIRECT_CHUNK_OVERHEAD	(TWO_SIZE_T_SIZES)
-/* ... and additional padding for fake next-chunk at foot */
-#define DIRECT_FOOT_PAD		(FOUR_SIZE_T_SIZES)
-
-/* The smallest size we can malloc is an aligned minimal chunk */
-#define MIN_CHUNK_SIZE\
-  ((MCHUNK_SIZE + CHUNK_ALIGN_MASK) & ~CHUNK_ALIGN_MASK)
-
-/* conversion from malloc headers to user pointers, and back */
-#define chunk2mem(p)		((void *)((char *)(p) + TWO_SIZE_T_SIZES))
-#define mem2chunk(mem)		((mchunkptr)((char *)(mem) - TWO_SIZE_T_SIZES))
-/* chunk associated with aligned address A */
-#define align_as_chunk(A)	(mchunkptr)((A) + align_offset(chunk2mem(A)))
-
-/* Bounds on request (not chunk) sizes. */
-#define MAX_REQUEST		((~MIN_CHUNK_SIZE+1) << 2)
-#define MIN_REQUEST		(MIN_CHUNK_SIZE - CHUNK_OVERHEAD - SIZE_T_ONE)
-
-/* pad request bytes into a usable size */
-#define pad_request(req) \
-   (((req) + CHUNK_OVERHEAD + CHUNK_ALIGN_MASK) & ~CHUNK_ALIGN_MASK)
-
-/* pad request, checking for minimum (but not maximum) */
-#define request2size(req) \
-  (((req) < MIN_REQUEST)? MIN_CHUNK_SIZE : pad_request(req))
-
-/* ------------------ Operations on head and foot fields ----------------- */
-
-#define PINUSE_BIT		(SIZE_T_ONE)
-#define CINUSE_BIT		(SIZE_T_TWO)
-#define INUSE_BITS		(PINUSE_BIT|CINUSE_BIT)
-
-/* Head value for fenceposts */
-#define FENCEPOST_HEAD		(INUSE_BITS|SIZE_T_SIZE)
-
-/* extraction of fields from head words */
-#define cinuse(p)		((p)->head & CINUSE_BIT)
-#define pinuse(p)		((p)->head & PINUSE_BIT)
-#define chunksize(p)		((p)->head & ~(INUSE_BITS))
-
-#define clear_pinuse(p)		((p)->head &= ~PINUSE_BIT)
-#define clear_cinuse(p)		((p)->head &= ~CINUSE_BIT)
-
-/* Treat space at ptr +/- offset as a chunk */
-#define chunk_plus_offset(p, s)		((mchunkptr)(((char *)(p)) + (s)))
-#define chunk_minus_offset(p, s)	((mchunkptr)(((char *)(p)) - (s)))
-
-/* Ptr to next or previous physical malloc_chunk. */
-#define next_chunk(p)	((mchunkptr)(((char *)(p)) + ((p)->head & ~INUSE_BITS)))
-#define prev_chunk(p)	((mchunkptr)(((char *)(p)) - ((p)->prev_foot) ))
-
-/* extract next chunk's pinuse bit */
-#define next_pinuse(p)	((next_chunk(p)->head) & PINUSE_BIT)
-
-/* Get/set size at footer */
-#define get_foot(p, s)	(((mchunkptr)((char *)(p) + (s)))->prev_foot)
-#define set_foot(p, s)	(((mchunkptr)((char *)(p) + (s)))->prev_foot = (s))
-
-/* Set size, pinuse bit, and foot */
-#define set_size_and_pinuse_of_free_chunk(p, s)\
-  ((p)->head = (s|PINUSE_BIT), set_foot(p, s))
-
-/* Set size, pinuse bit, foot, and clear next pinuse */
-#define set_free_with_pinuse(p, s, n)\
-  (clear_pinuse(n), set_size_and_pinuse_of_free_chunk(p, s))
-
-#define is_direct(p)\
-  (!((p)->head & PINUSE_BIT) && ((p)->prev_foot & IS_DIRECT_BIT))
-
-/* Get the internal overhead associated with chunk p */
-#define overhead_for(p)\
- (is_direct(p)? DIRECT_CHUNK_OVERHEAD : CHUNK_OVERHEAD)
-
-/* ---------------------- Overlaid data structures ----------------------- */
-
-struct malloc_tree_chunk {
-  /* The first four fields must be compatible with malloc_chunk */
-  size_t                    prev_foot;
-  size_t                    head;
-  struct malloc_tree_chunk *fd;
-  struct malloc_tree_chunk *bk;
-
-  struct malloc_tree_chunk *child[2];
-  struct malloc_tree_chunk *parent;
-  bindex_t                  index;
-};
-
-typedef struct malloc_tree_chunk  tchunk;
-typedef struct malloc_tree_chunk *tchunkptr;
-typedef struct malloc_tree_chunk *tbinptr; /* The type of bins of trees */
-
-/* A little helper macro for trees */
-#define leftmost_child(t) ((t)->child[0] != 0? (t)->child[0] : (t)->child[1])
-
-/* ----------------------------- Segments -------------------------------- */
-
-struct malloc_segment {
-  char        *base;             /* base address */
-  size_t       size;             /* allocated size */
-  struct malloc_segment *next;   /* ptr to next segment */
-};
-
-typedef struct malloc_segment  msegment;
-typedef struct malloc_segment *msegmentptr;
-
-/* ---------------------------- malloc_state ----------------------------- */
-
-/* Bin types, widths and sizes */
-#define NSMALLBINS		(32U)
-#define NTREEBINS		(32U)
-#define SMALLBIN_SHIFT		(3U)
-#define SMALLBIN_WIDTH		(SIZE_T_ONE << SMALLBIN_SHIFT)
-#define TREEBIN_SHIFT		(8U)
-#define MIN_LARGE_SIZE		(SIZE_T_ONE << TREEBIN_SHIFT)
-#define MAX_SMALL_SIZE		(MIN_LARGE_SIZE - SIZE_T_ONE)
-#define MAX_SMALL_REQUEST  (MAX_SMALL_SIZE - CHUNK_ALIGN_MASK - CHUNK_OVERHEAD)
-
-struct malloc_state {
-  binmap_t   smallmap;
-  binmap_t   treemap;
-  size_t     dvsize;
-  size_t     topsize;
-  mchunkptr  dv;
-  mchunkptr  top;
-  size_t     trim_check;
-  size_t     release_checks;
-  mchunkptr  smallbins[(NSMALLBINS+1)*2];
-  tbinptr    treebins[NTREEBINS];
-  msegment   seg;
-};
-
-typedef struct malloc_state *mstate;
-
-#define is_initialized(M)	((M)->top != 0)
-
-/* -------------------------- system alloc setup ------------------------- */
-
-/* page-align a size */
-#define page_align(S)\
- (((S) + (LJ_PAGESIZE - SIZE_T_ONE)) & ~(LJ_PAGESIZE - SIZE_T_ONE))
-
-/* granularity-align a size */
-#define granularity_align(S)\
-  (((S) + (DEFAULT_GRANULARITY - SIZE_T_ONE))\
-   & ~(DEFAULT_GRANULARITY - SIZE_T_ONE))
-
-#if LJ_TARGET_WINDOWS
-#define mmap_align(S)	granularity_align(S)
-#else
-#define mmap_align(S)	page_align(S)
-#endif
-
-/*  True if segment S holds address A */
-#define segment_holds(S, A)\
-  ((char *)(A) >= S->base && (char *)(A) < S->base + S->size)
-
-/* Return segment holding given address */
-static msegmentptr segment_holding(mstate m, char *addr)
-{
-  msegmentptr sp = &m->seg;
-  for (;;) {
-    if (addr >= sp->base && addr < sp->base + sp->size)
-      return sp;
-    if ((sp = sp->next) == 0)
-      return 0;
-  }
-}
-
-/* Return true if segment contains a segment link */
-static int has_segment_link(mstate m, msegmentptr ss)
-{
-  msegmentptr sp = &m->seg;
-  for (;;) {
-    if ((char *)sp >= ss->base && (char *)sp < ss->base + ss->size)
-      return 1;
-    if ((sp = sp->next) == 0)
-      return 0;
-  }
-}
-
-/*
-  TOP_FOOT_SIZE is padding at the end of a segment, including space
-  that may be needed to place segment records and fenceposts when new
-  noncontiguous segments are added.
-*/
-#define TOP_FOOT_SIZE\
-  (align_offset(chunk2mem(0))+pad_request(sizeof(struct malloc_segment))+MIN_CHUNK_SIZE)
-
-/* ---------------------------- Indexing Bins ---------------------------- */
-
-#define is_small(s)		(((s) >> SMALLBIN_SHIFT) < NSMALLBINS)
-#define small_index(s)		((s)  >> SMALLBIN_SHIFT)
-#define small_index2size(i)	((i)  << SMALLBIN_SHIFT)
-#define MIN_SMALL_INDEX		(small_index(MIN_CHUNK_SIZE))
-
-/* addressing by index. See above about smallbin repositioning */
-#define smallbin_at(M, i)	((sbinptr)((char *)&((M)->smallbins[(i)<<1])))
-#define treebin_at(M,i)		(&((M)->treebins[i]))
-
-/* assign tree index for size S to variable I */
-#define compute_tree_index(S, I)\
-{\
-  unsigned int X = (unsigned int)(S >> TREEBIN_SHIFT);\
-  if (X == 0) {\
-    I = 0;\
-  } else if (X > 0xFFFF) {\
-    I = NTREEBINS-1;\
-  } else {\
-    unsigned int K = lj_fls(X);\
-    I =  (bindex_t)((K << 1) + ((S >> (K + (TREEBIN_SHIFT-1)) & 1)));\
-  }\
-}
-
-/* Bit representing maximum resolved size in a treebin at i */
-#define bit_for_tree_index(i) \
-   (i == NTREEBINS-1)? (SIZE_T_BITSIZE-1) : (((i) >> 1) + TREEBIN_SHIFT - 2)
-
-/* Shift placing maximum resolved bit in a treebin at i as sign bit */
-#define leftshift_for_tree_index(i) \
-   ((i == NTREEBINS-1)? 0 : \
-    ((SIZE_T_BITSIZE-SIZE_T_ONE) - (((i) >> 1) + TREEBIN_SHIFT - 2)))
-
-/* The size of the smallest chunk held in bin with index i */
-#define minsize_for_tree_index(i) \
-   ((SIZE_T_ONE << (((i) >> 1) + TREEBIN_SHIFT)) |  \
-   (((size_t)((i) & SIZE_T_ONE)) << (((i) >> 1) + TREEBIN_SHIFT - 1)))
-
-/* ------------------------ Operations on bin maps ----------------------- */
-
-/* bit corresponding to given index */
-#define idx2bit(i)		((binmap_t)(1) << (i))
-
-/* Mark/Clear bits with given index */
-#define mark_smallmap(M,i)	((M)->smallmap |=  idx2bit(i))
-#define clear_smallmap(M,i)	((M)->smallmap &= ~idx2bit(i))
-#define smallmap_is_marked(M,i)	((M)->smallmap &   idx2bit(i))
-
-#define mark_treemap(M,i)	((M)->treemap  |=  idx2bit(i))
-#define clear_treemap(M,i)	((M)->treemap  &= ~idx2bit(i))
-#define treemap_is_marked(M,i)	((M)->treemap  &   idx2bit(i))
-
-/* mask with all bits to left of least bit of x on */
-#define left_bits(x)		((x<<1) | (~(x<<1)+1))
-
-/* Set cinuse bit and pinuse bit of next chunk */
-#define set_inuse(M,p,s)\
-  ((p)->head = (((p)->head & PINUSE_BIT)|s|CINUSE_BIT),\
-  ((mchunkptr)(((char *)(p)) + (s)))->head |= PINUSE_BIT)
-
-/* Set cinuse and pinuse of this chunk and pinuse of next chunk */
-#define set_inuse_and_pinuse(M,p,s)\
-  ((p)->head = (s|PINUSE_BIT|CINUSE_BIT),\
-  ((mchunkptr)(((char *)(p)) + (s)))->head |= PINUSE_BIT)
-
-/* Set size, cinuse and pinuse bit of this chunk */
-#define set_size_and_pinuse_of_inuse_chunk(M, p, s)\
-  ((p)->head = (s|PINUSE_BIT|CINUSE_BIT))
-
-/* ----------------------- Operations on smallbins ----------------------- */
-
-/* Link a free chunk into a smallbin  */
-#define insert_small_chunk(M, P, S) {\
-  bindex_t I = small_index(S);\
-  mchunkptr B = smallbin_at(M, I);\
-  mchunkptr F = B;\
-  if (!smallmap_is_marked(M, I))\
-    mark_smallmap(M, I);\
-  else\
-    F = B->fd;\
-  B->fd = P;\
-  F->bk = P;\
-  P->fd = F;\
-  P->bk = B;\
-}
-
-/* Unlink a chunk from a smallbin  */
-#define unlink_small_chunk(M, P, S) {\
-  mchunkptr F = P->fd;\
-  mchunkptr B = P->bk;\
-  bindex_t I = small_index(S);\
-  if (F == B) {\
-    clear_smallmap(M, I);\
-  } else {\
-    F->bk = B;\
-    B->fd = F;\
-  }\
-}
-
-/* Unlink the first chunk from a smallbin */
-#define unlink_first_small_chunk(M, B, P, I) {\
-  mchunkptr F = P->fd;\
-  if (B == F) {\
-    clear_smallmap(M, I);\
-  } else {\
-    B->fd = F;\
-    F->bk = B;\
-  }\
-}
-
-/* Replace dv node, binning the old one */
-/* Used only when dvsize known to be small */
-#define replace_dv(M, P, S) {\
-  size_t DVS = M->dvsize;\
-  if (DVS != 0) {\
-    mchunkptr DV = M->dv;\
-    insert_small_chunk(M, DV, DVS);\
-  }\
-  M->dvsize = S;\
-  M->dv = P;\
-}
-
-/* ------------------------- Operations on trees ------------------------- */
-
-/* Insert chunk into tree */
-#define insert_large_chunk(M, X, S) {\
-  tbinptr *H;\
-  bindex_t I;\
-  compute_tree_index(S, I);\
-  H = treebin_at(M, I);\
-  X->index = I;\
-  X->child[0] = X->child[1] = 0;\
-  if (!treemap_is_marked(M, I)) {\
-    mark_treemap(M, I);\
-    *H = X;\
-    X->parent = (tchunkptr)H;\
-    X->fd = X->bk = X;\
-  } else {\
-    tchunkptr T = *H;\
-    size_t K = S << leftshift_for_tree_index(I);\
-    for (;;) {\
-      if (chunksize(T) != S) {\
-	tchunkptr *C = &(T->child[(K >> (SIZE_T_BITSIZE-SIZE_T_ONE)) & 1]);\
-	K <<= 1;\
-	if (*C != 0) {\
-	  T = *C;\
-	} else {\
-	  *C = X;\
-	  X->parent = T;\
-	  X->fd = X->bk = X;\
-	  break;\
-	}\
-      } else {\
-	tchunkptr F = T->fd;\
-	T->fd = F->bk = X;\
-	X->fd = F;\
-	X->bk = T;\
-	X->parent = 0;\
-	break;\
-      }\
-    }\
-  }\
-}
-
-#define unlink_large_chunk(M, X) {\
-  tchunkptr XP = X->parent;\
-  tchunkptr R;\
-  if (X->bk != X) {\
-    tchunkptr F = X->fd;\
-    R = X->bk;\
-    F->bk = R;\
-    R->fd = F;\
-  } else {\
-    tchunkptr *RP;\
-    if (((R = *(RP = &(X->child[1]))) != 0) ||\
-	((R = *(RP = &(X->child[0]))) != 0)) {\
-      tchunkptr *CP;\
-      while ((*(CP = &(R->child[1])) != 0) ||\
-	     (*(CP = &(R->child[0])) != 0)) {\
-	R = *(RP = CP);\
-      }\
-      *RP = 0;\
-    }\
-  }\
-  if (XP != 0) {\
-    tbinptr *H = treebin_at(M, X->index);\
-    if (X == *H) {\
-      if ((*H = R) == 0) \
-	clear_treemap(M, X->index);\
-    } else {\
-      if (XP->child[0] == X) \
-	XP->child[0] = R;\
-      else \
-	XP->child[1] = R;\
-    }\
-    if (R != 0) {\
-      tchunkptr C0, C1;\
-      R->parent = XP;\
-      if ((C0 = X->child[0]) != 0) {\
-	R->child[0] = C0;\
-	C0->parent = R;\
-      }\
-      if ((C1 = X->child[1]) != 0) {\
-	R->child[1] = C1;\
-	C1->parent = R;\
-      }\
-    }\
-  }\
-}
-
-/* Relays to large vs small bin operations */
-
-#define insert_chunk(M, P, S)\
-  if (is_small(S)) { insert_small_chunk(M, P, S)\
-  } else { tchunkptr TP = (tchunkptr)(P); insert_large_chunk(M, TP, S); }
-
-#define unlink_chunk(M, P, S)\
-  if (is_small(S)) { unlink_small_chunk(M, P, S)\
-  } else { tchunkptr TP = (tchunkptr)(P); unlink_large_chunk(M, TP); }
-
-/* -----------------------  Direct-mmapping chunks ----------------------- */
-
-static void *direct_alloc(size_t nb)
-{
-  size_t mmsize = mmap_align(nb + SIX_SIZE_T_SIZES + CHUNK_ALIGN_MASK);
-  if (LJ_LIKELY(mmsize > nb)) {     /* Check for wrap around 0 */
-    char *mm = (char *)(DIRECT_MMAP(mmsize));
-    if (mm != CMFAIL) {
-      size_t offset = align_offset(chunk2mem(mm));
-      size_t psize = mmsize - offset - DIRECT_FOOT_PAD;
-      mchunkptr p = (mchunkptr)(mm + offset);
-      p->prev_foot = offset | IS_DIRECT_BIT;
-      p->head = psize|CINUSE_BIT;
-      chunk_plus_offset(p, psize)->head = FENCEPOST_HEAD;
-      chunk_plus_offset(p, psize+SIZE_T_SIZE)->head = 0;
-      return chunk2mem(p);
-    }
-  }
-  return NULL;
-}
-
-static mchunkptr direct_resize(mchunkptr oldp, size_t nb)
-{
-  size_t oldsize = chunksize(oldp);
-  if (is_small(nb)) /* Can't shrink direct regions below small size */
-    return NULL;
-  /* Keep old chunk if big enough but not too big */
-  if (oldsize >= nb + SIZE_T_SIZE &&
-      (oldsize - nb) <= (DEFAULT_GRANULARITY >> 1)) {
-    return oldp;
-  } else {
-    size_t offset = oldp->prev_foot & ~IS_DIRECT_BIT;
-    size_t oldmmsize = oldsize + offset + DIRECT_FOOT_PAD;
-    size_t newmmsize = mmap_align(nb + SIX_SIZE_T_SIZES + CHUNK_ALIGN_MASK);
-    char *cp = (char *)CALL_MREMAP((char *)oldp - offset,
-				   oldmmsize, newmmsize, CALL_MREMAP_MV);
-    if (cp != CMFAIL) {
-      mchunkptr newp = (mchunkptr)(cp + offset);
-      size_t psize = newmmsize - offset - DIRECT_FOOT_PAD;
-      newp->head = psize|CINUSE_BIT;
-      chunk_plus_offset(newp, psize)->head = FENCEPOST_HEAD;
-      chunk_plus_offset(newp, psize+SIZE_T_SIZE)->head = 0;
-      return newp;
-    }
-  }
-  return NULL;
-}
-
-/* -------------------------- mspace management -------------------------- */
-
-/* Initialize top chunk and its size */
-static void init_top(mstate m, mchunkptr p, size_t psize)
-{
-  /* Ensure alignment */
-  size_t offset = align_offset(chunk2mem(p));
-  p = (mchunkptr)((char *)p + offset);
-  psize -= offset;
-
-  m->top = p;
-  m->topsize = psize;
-  p->head = psize | PINUSE_BIT;
-  /* set size of fake trailing chunk holding overhead space only once */
-  chunk_plus_offset(p, psize)->head = TOP_FOOT_SIZE;
-  m->trim_check = DEFAULT_TRIM_THRESHOLD; /* reset on each update */
-}
-
-/* Initialize bins for a new mstate that is otherwise zeroed out */
-static void init_bins(mstate m)
-{
-  /* Establish circular links for smallbins */
-  bindex_t i;
-  for (i = 0; i < NSMALLBINS; i++) {
-    sbinptr bin = smallbin_at(m,i);
-    bin->fd = bin->bk = bin;
-  }
-}
-
-/* Allocate chunk and prepend remainder with chunk in successor base. */
-static void *prepend_alloc(mstate m, char *newbase, char *oldbase, size_t nb)
-{
-  mchunkptr p = align_as_chunk(newbase);
-  mchunkptr oldfirst = align_as_chunk(oldbase);
-  size_t psize = (size_t)((char *)oldfirst - (char *)p);
-  mchunkptr q = chunk_plus_offset(p, nb);
-  size_t qsize = psize - nb;
-  set_size_and_pinuse_of_inuse_chunk(m, p, nb);
-
-  /* consolidate remainder with first chunk of old base */
-  if (oldfirst == m->top) {
-    size_t tsize = m->topsize += qsize;
-    m->top = q;
-    q->head = tsize | PINUSE_BIT;
-  } else if (oldfirst == m->dv) {
-    size_t dsize = m->dvsize += qsize;
-    m->dv = q;
-    set_size_and_pinuse_of_free_chunk(q, dsize);
-  } else {
-    if (!cinuse(oldfirst)) {
-      size_t nsize = chunksize(oldfirst);
-      unlink_chunk(m, oldfirst, nsize);
-      oldfirst = chunk_plus_offset(oldfirst, nsize);
-      qsize += nsize;
-    }
-    set_free_with_pinuse(q, qsize, oldfirst);
-    insert_chunk(m, q, qsize);
-  }
-
-  return chunk2mem(p);
-}
-
-/* Add a segment to hold a new noncontiguous region */
-static void add_segment(mstate m, char *tbase, size_t tsize)
-{
-  /* Determine locations and sizes of segment, fenceposts, old top */
-  char *old_top = (char *)m->top;
-  msegmentptr oldsp = segment_holding(m, old_top);
-  char *old_end = oldsp->base + oldsp->size;
-  size_t ssize = pad_request(sizeof(struct malloc_segment));
-  char *rawsp = old_end - (ssize + FOUR_SIZE_T_SIZES + CHUNK_ALIGN_MASK);
-  size_t offset = align_offset(chunk2mem(rawsp));
-  char *asp = rawsp + offset;
-  char *csp = (asp < (old_top + MIN_CHUNK_SIZE))? old_top : asp;
-  mchunkptr sp = (mchunkptr)csp;
-  msegmentptr ss = (msegmentptr)(chunk2mem(sp));
-  mchunkptr tnext = chunk_plus_offset(sp, ssize);
-  mchunkptr p = tnext;
-
-  /* reset top to new space */
-  init_top(m, (mchunkptr)tbase, tsize - TOP_FOOT_SIZE);
-
-  /* Set up segment record */
-  set_size_and_pinuse_of_inuse_chunk(m, sp, ssize);
-  *ss = m->seg; /* Push current record */
-  m->seg.base = tbase;
-  m->seg.size = tsize;
-  m->seg.next = ss;
-
-  /* Insert trailing fenceposts */
-  for (;;) {
-    mchunkptr nextp = chunk_plus_offset(p, SIZE_T_SIZE);
-    p->head = FENCEPOST_HEAD;
-    if ((char *)(&(nextp->head)) < old_end)
-      p = nextp;
-    else
-      break;
-  }
-
-  /* Insert the rest of old top into a bin as an ordinary free chunk */
-  if (csp != old_top) {
-    mchunkptr q = (mchunkptr)old_top;
-    size_t psize = (size_t)(csp - old_top);
-    mchunkptr tn = chunk_plus_offset(q, psize);
-    set_free_with_pinuse(q, psize, tn);
-    insert_chunk(m, q, psize);
-  }
-}
-
-/* -------------------------- System allocation -------------------------- */
-
-static void *alloc_sys(mstate m, size_t nb)
-{
-  char *tbase = CMFAIL;
-  size_t tsize = 0;
-
-  /* Directly map large chunks */
-  if (LJ_UNLIKELY(nb >= DEFAULT_MMAP_THRESHOLD)) {
-    void *mem = direct_alloc(nb);
-    if (mem != 0)
-      return mem;
-  }
-
-  {
-    size_t req = nb + TOP_FOOT_SIZE + SIZE_T_ONE;
-    size_t rsize = granularity_align(req);
-    if (LJ_LIKELY(rsize > nb)) { /* Fail if wraps around zero */
-      char *mp = (char *)(CALL_MMAP(rsize));
-      if (mp != CMFAIL) {
-	tbase = mp;
-	tsize = rsize;
-      }
-    }
-  }
-
-  if (tbase != CMFAIL) {
-    msegmentptr sp = &m->seg;
-    /* Try to merge with an existing segment */
-    while (sp != 0 && tbase != sp->base + sp->size)
-      sp = sp->next;
-    if (sp != 0 && segment_holds(sp, m->top)) { /* append */
-      sp->size += tsize;
-      init_top(m, m->top, m->topsize + tsize);
-    } else {
-      sp = &m->seg;
-      while (sp != 0 && sp->base != tbase + tsize)
-	sp = sp->next;
-      if (sp != 0) {
-	char *oldbase = sp->base;
-	sp->base = tbase;
-	sp->size += tsize;
-	return prepend_alloc(m, tbase, oldbase, nb);
-      } else {
-	add_segment(m, tbase, tsize);
-      }
-    }
-
-    if (nb < m->topsize) { /* Allocate from new or extended top space */
-      size_t rsize = m->topsize -= nb;
-      mchunkptr p = m->top;
-      mchunkptr r = m->top = chunk_plus_offset(p, nb);
-      r->head = rsize | PINUSE_BIT;
-      set_size_and_pinuse_of_inuse_chunk(m, p, nb);
-      return chunk2mem(p);
-    }
-  }
-
-  return NULL;
-}
-
-/* -----------------------  system deallocation -------------------------- */
-
-/* Unmap and unlink any mmapped segments that don't contain used chunks */
-static size_t release_unused_segments(mstate m)
-{
-  size_t released = 0;
-  size_t nsegs = 0;
-  msegmentptr pred = &m->seg;
-  msegmentptr sp = pred->next;
-  while (sp != 0) {
-    char *base = sp->base;
-    size_t size = sp->size;
-    msegmentptr next = sp->next;
-    nsegs++;
-    {
-      mchunkptr p = align_as_chunk(base);
-      size_t psize = chunksize(p);
-      /* Can unmap if first chunk holds entire segment and not pinned */
-      if (!cinuse(p) && (char *)p + psize >= base + size - TOP_FOOT_SIZE) {
-	tchunkptr tp = (tchunkptr)p;
-	if (p == m->dv) {
-	  m->dv = 0;
-	  m->dvsize = 0;
-	} else {
-	  unlink_large_chunk(m, tp);
-	}
-	if (CALL_MUNMAP(base, size) == 0) {
-	  released += size;
-	  /* unlink obsoleted record */
-	  sp = pred;
-	  sp->next = next;
-	} else { /* back out if cannot unmap */
-	  insert_large_chunk(m, tp, psize);
-	}
-      }
-    }
-    pred = sp;
-    sp = next;
-  }
-  /* Reset check counter */
-  m->release_checks = nsegs > MAX_RELEASE_CHECK_RATE ?
-		      nsegs : MAX_RELEASE_CHECK_RATE;
-  return released;
-}
-
-static int alloc_trim(mstate m, size_t pad)
-{
-  size_t released = 0;
-  if (pad < MAX_REQUEST && is_initialized(m)) {
-    pad += TOP_FOOT_SIZE; /* ensure enough room for segment overhead */
-
-    if (m->topsize > pad) {
-      /* Shrink top space in granularity-size units, keeping at least one */
-      size_t unit = DEFAULT_GRANULARITY;
-      size_t extra = ((m->topsize - pad + (unit - SIZE_T_ONE)) / unit -
-		      SIZE_T_ONE) * unit;
-      msegmentptr sp = segment_holding(m, (char *)m->top);
-
-      if (sp->size >= extra &&
-	  !has_segment_link(m, sp)) { /* can't shrink if pinned */
-	size_t newsize = sp->size - extra;
-	/* Prefer mremap, fall back to munmap */
-	if ((CALL_MREMAP(sp->base, sp->size, newsize, CALL_MREMAP_NOMOVE) != MFAIL) ||
-	    (CALL_MUNMAP(sp->base + newsize, extra) == 0)) {
-	  released = extra;
-	}
-      }
-
-      if (released != 0) {
-	sp->size -= released;
-	init_top(m, m->top, m->topsize - released);
-      }
-    }
-
-    /* Unmap any unused mmapped segments */
-    released += release_unused_segments(m);
-
-    /* On failure, disable autotrim to avoid repeated failed future calls */
-    if (released == 0 && m->topsize > m->trim_check)
-      m->trim_check = MAX_SIZE_T;
-  }
-
-  return (released != 0)? 1 : 0;
-}
-
-/* ---------------------------- malloc support --------------------------- */
-
-/* allocate a large request from the best fitting chunk in a treebin */
-static void *tmalloc_large(mstate m, size_t nb)
-{
-  tchunkptr v = 0;
-  size_t rsize = ~nb+1; /* Unsigned negation */
-  tchunkptr t;
-  bindex_t idx;
-  compute_tree_index(nb, idx);
-
-  if ((t = *treebin_at(m, idx)) != 0) {
-    /* Traverse tree for this bin looking for node with size == nb */
-    size_t sizebits = nb << leftshift_for_tree_index(idx);
-    tchunkptr rst = 0;  /* The deepest untaken right subtree */
-    for (;;) {
-      tchunkptr rt;
-      size_t trem = chunksize(t) - nb;
-      if (trem < rsize) {
-	v = t;
-	if ((rsize = trem) == 0)
-	  break;
-      }
-      rt = t->child[1];
-      t = t->child[(sizebits >> (SIZE_T_BITSIZE-SIZE_T_ONE)) & 1];
-      if (rt != 0 && rt != t)
-	rst = rt;
-      if (t == 0) {
-	t = rst; /* set t to least subtree holding sizes > nb */
-	break;
-      }
-      sizebits <<= 1;
-    }
-  }
-
-  if (t == 0 && v == 0) { /* set t to root of next non-empty treebin */
-    binmap_t leftbits = left_bits(idx2bit(idx)) & m->treemap;
-    if (leftbits != 0)
-      t = *treebin_at(m, lj_ffs(leftbits));
-  }
-
-  while (t != 0) { /* find smallest of tree or subtree */
-    size_t trem = chunksize(t) - nb;
-    if (trem < rsize) {
-      rsize = trem;
-      v = t;
-    }
-    t = leftmost_child(t);
-  }
-
-  /*  If dv is a better fit, return NULL so malloc will use it */
-  if (v != 0 && rsize < (size_t)(m->dvsize - nb)) {
-    mchunkptr r = chunk_plus_offset(v, nb);
-    unlink_large_chunk(m, v);
-    if (rsize < MIN_CHUNK_SIZE) {
-      set_inuse_and_pinuse(m, v, (rsize + nb));
-    } else {
-      set_size_and_pinuse_of_inuse_chunk(m, v, nb);
-      set_size_and_pinuse_of_free_chunk(r, rsize);
-      insert_chunk(m, r, rsize);
-    }
-    return chunk2mem(v);
-  }
-  return NULL;
-}
-
-/* allocate a small request from the best fitting chunk in a treebin */
-static void *tmalloc_small(mstate m, size_t nb)
-{
-  tchunkptr t, v;
-  mchunkptr r;
-  size_t rsize;
-  bindex_t i = lj_ffs(m->treemap);
-
-  v = t = *treebin_at(m, i);
-  rsize = chunksize(t) - nb;
-
-  while ((t = leftmost_child(t)) != 0) {
-    size_t trem = chunksize(t) - nb;
-    if (trem < rsize) {
-      rsize = trem;
-      v = t;
-    }
-  }
-
-  r = chunk_plus_offset(v, nb);
-  unlink_large_chunk(m, v);
-  if (rsize < MIN_CHUNK_SIZE) {
-    set_inuse_and_pinuse(m, v, (rsize + nb));
-  } else {
-    set_size_and_pinuse_of_inuse_chunk(m, v, nb);
-    set_size_and_pinuse_of_free_chunk(r, rsize);
-    replace_dv(m, r, rsize);
-  }
-  return chunk2mem(v);
-}
-
-/* ----------------------------------------------------------------------- */
-
-void *lj_alloc_create(void)
-{
-  size_t tsize = DEFAULT_GRANULARITY;
-  char *tbase;
-  INIT_MMAP();
-  tbase = (char *)(CALL_MMAP(tsize));
-  if (tbase != CMFAIL) {
-    size_t msize = pad_request(sizeof(struct malloc_state));
-    mchunkptr mn;
-    mchunkptr msp = align_as_chunk(tbase);
-    mstate m = (mstate)(chunk2mem(msp));
-    memset(m, 0, msize);
-    msp->head = (msize|PINUSE_BIT|CINUSE_BIT);
-    m->seg.base = tbase;
-    m->seg.size = tsize;
-    m->release_checks = MAX_RELEASE_CHECK_RATE;
-    init_bins(m);
-    mn = next_chunk(mem2chunk(m));
-    init_top(m, mn, (size_t)((tbase + tsize) - (char *)mn) - TOP_FOOT_SIZE);
-    return m;
-  }
-  return NULL;
-}
-
-void lj_alloc_destroy(void *msp)
-{
-  mstate ms = (mstate)msp;
-  msegmentptr sp = &ms->seg;
-  while (sp != 0) {
-    char *base = sp->base;
-    size_t size = sp->size;
-    sp = sp->next;
-    CALL_MUNMAP(base, size);
-  }
-}
-
-static LJ_NOINLINE void *lj_alloc_malloc(void *msp, size_t nsize)
-{
-  mstate ms = (mstate)msp;
-  void *mem;
-  size_t nb;
-  if (nsize <= MAX_SMALL_REQUEST) {
-    bindex_t idx;
-    binmap_t smallbits;
-    nb = (nsize < MIN_REQUEST)? MIN_CHUNK_SIZE : pad_request(nsize);
-    idx = small_index(nb);
-    smallbits = ms->smallmap >> idx;
-
-    if ((smallbits & 0x3U) != 0) { /* Remainderless fit to a smallbin. */
-      mchunkptr b, p;
-      idx += ~smallbits & 1;       /* Uses next bin if idx empty */
-      b = smallbin_at(ms, idx);
-      p = b->fd;
-      unlink_first_small_chunk(ms, b, p, idx);
-      set_inuse_and_pinuse(ms, p, small_index2size(idx));
-      mem = chunk2mem(p);
-      return mem;
-    } else if (nb > ms->dvsize) {
-      if (smallbits != 0) { /* Use chunk in next nonempty smallbin */
-	mchunkptr b, p, r;
-	size_t rsize;
-	binmap_t leftbits = (smallbits << idx) & left_bits(idx2bit(idx));
-	bindex_t i = lj_ffs(leftbits);
-	b = smallbin_at(ms, i);
-	p = b->fd;
-	unlink_first_small_chunk(ms, b, p, i);
-	rsize = small_index2size(i) - nb;
-	/* Fit here cannot be remainderless if 4byte sizes */
-	if (SIZE_T_SIZE != 4 && rsize < MIN_CHUNK_SIZE) {
-	  set_inuse_and_pinuse(ms, p, small_index2size(i));
-	} else {
-	  set_size_and_pinuse_of_inuse_chunk(ms, p, nb);
-	  r = chunk_plus_offset(p, nb);
-	  set_size_and_pinuse_of_free_chunk(r, rsize);
-	  replace_dv(ms, r, rsize);
-	}
-	mem = chunk2mem(p);
-	return mem;
-      } else if (ms->treemap != 0 && (mem = tmalloc_small(ms, nb)) != 0) {
-	return mem;
-      }
-    }
-  } else if (nsize >= MAX_REQUEST) {
-    nb = MAX_SIZE_T; /* Too big to allocate. Force failure (in sys alloc) */
-  } else {
-    nb = pad_request(nsize);
-    if (ms->treemap != 0 && (mem = tmalloc_large(ms, nb)) != 0) {
-      return mem;
-    }
-  }
-
-  if (nb <= ms->dvsize) {
-    size_t rsize = ms->dvsize - nb;
-    mchunkptr p = ms->dv;
-    if (rsize >= MIN_CHUNK_SIZE) { /* split dv */
-      mchunkptr r = ms->dv = chunk_plus_offset(p, nb);
-      ms->dvsize = rsize;
-      set_size_and_pinuse_of_free_chunk(r, rsize);
-      set_size_and_pinuse_of_inuse_chunk(ms, p, nb);
-    } else { /* exhaust dv */
-      size_t dvs = ms->dvsize;
-      ms->dvsize = 0;
-      ms->dv = 0;
-      set_inuse_and_pinuse(ms, p, dvs);
-    }
-    mem = chunk2mem(p);
-    return mem;
-  } else if (nb < ms->topsize) { /* Split top */
-    size_t rsize = ms->topsize -= nb;
-    mchunkptr p = ms->top;
-    mchunkptr r = ms->top = chunk_plus_offset(p, nb);
-    r->head = rsize | PINUSE_BIT;
-    set_size_and_pinuse_of_inuse_chunk(ms, p, nb);
-    mem = chunk2mem(p);
-    return mem;
-  }
-  return alloc_sys(ms, nb);
-}
-
-static LJ_NOINLINE void *lj_alloc_free(void *msp, void *ptr)
-{
-  if (ptr != 0) {
-    mchunkptr p = mem2chunk(ptr);
-    mstate fm = (mstate)msp;
-    size_t psize = chunksize(p);
-    mchunkptr next = chunk_plus_offset(p, psize);
-    if (!pinuse(p)) {
-      size_t prevsize = p->prev_foot;
-      if ((prevsize & IS_DIRECT_BIT) != 0) {
-	prevsize &= ~IS_DIRECT_BIT;
-	psize += prevsize + DIRECT_FOOT_PAD;
-	CALL_MUNMAP((char *)p - prevsize, psize);
-	return NULL;
-      } else {
-	mchunkptr prev = chunk_minus_offset(p, prevsize);
-	psize += prevsize;
-	p = prev;
-	/* consolidate backward */
-	if (p != fm->dv) {
-	  unlink_chunk(fm, p, prevsize);
-	} else if ((next->head & INUSE_BITS) == INUSE_BITS) {
-	  fm->dvsize = psize;
-	  set_free_with_pinuse(p, psize, next);
-	  return NULL;
-	}
-      }
-    }
-    if (!cinuse(next)) {  /* consolidate forward */
-      if (next == fm->top) {
-	size_t tsize = fm->topsize += psize;
-	fm->top = p;
-	p->head = tsize | PINUSE_BIT;
-	if (p == fm->dv) {
-	  fm->dv = 0;
-	  fm->dvsize = 0;
-	}
-	if (tsize > fm->trim_check)
-	  alloc_trim(fm, 0);
-	return NULL;
-      } else if (next == fm->dv) {
-	size_t dsize = fm->dvsize += psize;
-	fm->dv = p;
-	set_size_and_pinuse_of_free_chunk(p, dsize);
-	return NULL;
-      } else {
-	size_t nsize = chunksize(next);
-	psize += nsize;
-	unlink_chunk(fm, next, nsize);
-	set_size_and_pinuse_of_free_chunk(p, psize);
-	if (p == fm->dv) {
-	  fm->dvsize = psize;
-	  return NULL;
-	}
-      }
-    } else {
-      set_free_with_pinuse(p, psize, next);
-    }
-
-    if (is_small(psize)) {
-      insert_small_chunk(fm, p, psize);
-    } else {
-      tchunkptr tp = (tchunkptr)p;
-      insert_large_chunk(fm, tp, psize);
-      if (--fm->release_checks == 0)
-	release_unused_segments(fm);
-    }
-  }
-  return NULL;
-}
-
-static LJ_NOINLINE void *lj_alloc_realloc(void *msp, void *ptr, size_t nsize)
-{
-  if (nsize >= MAX_REQUEST) {
-    return NULL;
-  } else {
-    mstate m = (mstate)msp;
-    mchunkptr oldp = mem2chunk(ptr);
-    size_t oldsize = chunksize(oldp);
-    mchunkptr next = chunk_plus_offset(oldp, oldsize);
-    mchunkptr newp = 0;
-    size_t nb = request2size(nsize);
-
-    /* Try to either shrink or extend into top. Else malloc-copy-free */
-    if (is_direct(oldp)) {
-      newp = direct_resize(oldp, nb);  /* this may return NULL. */
-    } else if (oldsize >= nb) { /* already big enough */
-      size_t rsize = oldsize - nb;
-      newp = oldp;
-      if (rsize >= MIN_CHUNK_SIZE) {
-	mchunkptr rem = chunk_plus_offset(newp, nb);
-	set_inuse(m, newp, nb);
-	set_inuse(m, rem, rsize);
-	lj_alloc_free(m, chunk2mem(rem));
-      }
-    } else if (next == m->top && oldsize + m->topsize > nb) {
-      /* Expand into top */
-      size_t newsize = oldsize + m->topsize;
-      size_t newtopsize = newsize - nb;
-      mchunkptr newtop = chunk_plus_offset(oldp, nb);
-      set_inuse(m, oldp, nb);
-      newtop->head = newtopsize |PINUSE_BIT;
-      m->top = newtop;
-      m->topsize = newtopsize;
-      newp = oldp;
-    }
-
-    if (newp != 0) {
-      return chunk2mem(newp);
-    } else {
-      void *newmem = lj_alloc_malloc(m, nsize);
-      if (newmem != 0) {
-	size_t oc = oldsize - overhead_for(oldp);
-	memcpy(newmem, ptr, oc < nsize ? oc : nsize);
-	lj_alloc_free(m, ptr);
-      }
-      return newmem;
-    }
-  }
-}
-
-void *lj_alloc_f(void *msp, void *ptr, size_t osize, size_t nsize)
-{
-  (void)osize;
-  if (nsize == 0) {
-    return lj_alloc_free(msp, ptr);
-  } else if (ptr == NULL) {
-    return lj_alloc_malloc(msp, nsize);
-  } else {
-    return lj_alloc_realloc(msp, ptr, nsize);
-  }
-}
-
-#endif