dlmalloc.c File Reference

#include "dlmalloc.h"
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/param.h>

Data Structures
struct	malloc_chunk
struct	malloc_params
struct	malloc_segment
struct	malloc_state
struct	malloc_tree_chunk

Macros
#define	ACQUIRE_MAGIC_INIT_LOCK()
#define	ACQUIRE_MORECORE_LOCK()
#define	align_as_chunk(A)   (mchunkptr)((A) + align_offset(chunk2mem(A)))
#define	align_offset(A)
#define	assert(x)
#define	bit_for_tree_index(i)   (i == NTREEBINS-1)? (SIZE_T_BITSIZE-1) : (((i) >> 1) + TREEBIN_SHIFT - 2)
#define	CALL_MMAP(s)   mmap(0, (s), MMAP_PROT, MMAP_FLAGS, -1, 0)
#define	CALL_MORECORE(S)   MORECORE(S)
#define	CALL_MREMAP(addr, osz, nsz, mv)   MFAIL
#define	CALL_MUNMAP(a, s)   munmap((a), (s))
#define	calloc_must_clear(p)   (!is_mmapped(p))
#define	check_free_chunk(M, P)
#define	check_inuse_chunk(M, P)
#define	check_malloc_state(M)
#define	check_malloced_chunk(M, P, N)
#define	check_mmapped_chunk(M, P)
#define	check_top_chunk(M, P)
#define	chunk2mem(p)   ((void*)((char*)(p) + TWO_SIZE_T_SIZES))
#define	CHUNK_ALIGN_MASK   (MALLOC_ALIGNMENT - SIZE_T_ONE)
#define	chunk_minus_offset(p, s)   ((mchunkptr)(((char*)(p)) - (s)))
#define	CHUNK_OVERHEAD   (SIZE_T_SIZE)
#define	chunk_plus_offset(p, s)   ((mchunkptr)(((char*)(p)) + (s)))
#define	chunksize(p)   ((p)->head & ~(INUSE_BITS))
#define	cinuse(p)   ((p)->head & CINUSE_BIT)
#define	CINUSE_BIT   (SIZE_T_TWO)
#define	clear_cinuse(p)   ((p)->head &= ~CINUSE_BIT)
#define	clear_pinuse(p)   ((p)->head &= ~PINUSE_BIT)
#define	clear_smallmap(M, i)   ((M)->smallmap &= ~idx2bit(i))
#define	clear_treemap(M, i)   ((M)->treemap &= ~idx2bit(i))
#define	CMFAIL   ((char*)(MFAIL)) /* defined for convenience */
#define	compute_bit2idx(X, I)
#define	compute_tree_index(S, I)
#define	CORRUPTION_ERROR_ACTION(m)   ABORT
#define	DIRECT_MMAP(s)   CALL_MMAP(s)
#define	disable_contiguous(M)   ((M)->mflags |= USE_NONCONTIGUOUS_BIT)
#define	disable_lock(M)   ((M)->mflags &= ~USE_LOCK_BIT)
#define	disable_mmap(M)   ((M)->mflags &= ~USE_MMAP_BIT)
#define	enable_lock(M)   ((M)->mflags |= USE_LOCK_BIT)
#define	enable_mmap(M)   ((M)->mflags |= USE_MMAP_BIT)
#define	EXTERN_BIT   (8U)
#define	FENCEPOST_HEAD   (INUSE_BITS|SIZE_T_SIZE)
#define	fm   gm
#define	FOUR_SIZE_T_SIZES   (SIZE_T_SIZE<<2)
#define	get_foot(p, s)   (((mchunkptr)((char*)(p) + (s)))->prev_foot)
#define	gm   (&_gm_)
#define	granularity_align(S)   (((S) + (mparams.granularity)) & ~(mparams.granularity - SIZE_T_ONE))
#define	HALF_MAX_SIZE_T   (MAX_SIZE_T / 2U)
#define	idx2bit(i)   ((binmap_t)(1) << (i))
#define	INITIAL_LOCK(l)
#define	insert_chunk(M, P, S)
#define	insert_large_chunk(M, X, S)
#define	insert_small_chunk(M, P, S)
#define	internal_free(m, mem)   dlfree(mem)
#define	internal_malloc(m, b)   dlmalloc(b)
#define	INUSE_BITS   (PINUSE_BIT|CINUSE_BIT)
#define	is_aligned(A)   (((size_t)((A)) & (CHUNK_ALIGN_MASK)) == 0)
#define	is_extern_segment(S)   ((S)->sflags & EXTERN_BIT)
#define	is_global(M)   ((M) == &_gm_)
#define	is_granularity_aligned(S)   (((size_t)(S) & (mparams.granularity - SIZE_T_ONE)) == 0)
#define	is_initialized(M)   ((M)->top != 0)
#define	is_mmapped(p)   (!((p)->head & PINUSE_BIT) && ((p)->prev_foot & IS_MMAPPED_BIT))
#define	IS_MMAPPED_BIT   (SIZE_T_ONE)
#define	is_mmapped_segment(S)   ((S)->sflags & IS_MMAPPED_BIT)
#define	is_page_aligned(S)   (((size_t)(S) & (mparams.page_size - SIZE_T_ONE)) == 0)
#define	is_small(s)   (((s) >> SMALLBIN_SHIFT) < NSMALLBINS)
#define	least_bit(x)   ((x) & -(x))
#define	left_bits(x)   ((x<<1) | -(x<<1))
#define	leftmost_child(t)   ((t)->child[0] != 0? (t)->child[0] : (t)->child[1])
#define	leftshift_for_tree_index(i)
#define	malloc_getpagesize   ((size_t)4096U)
#define	mark_inuse_foot(M, p, s)
#define	mark_smallmap(M, i)   ((M)->smallmap |= idx2bit(i))
#define	mark_treemap(M, i)   ((M)->treemap |= idx2bit(i))
#define	MAX_REQUEST   ((-MIN_CHUNK_SIZE) << 2)
#define	MAX_SMALL_REQUEST   (MAX_SMALL_SIZE - CHUNK_ALIGN_MASK - CHUNK_OVERHEAD)
#define	MAX_SMALL_SIZE   (MIN_LARGE_SIZE - SIZE_T_ONE)
#define	MCHUNK_SIZE   (sizeof(mchunk))
#define	mem2chunk(mem)   ((mchunkptr)((char*)(mem) - TWO_SIZE_T_SIZES))
#define	MFAIL   ((void*)(MAX_SIZE_T))
#define	MIN_CHUNK_SIZE   ((MCHUNK_SIZE + CHUNK_ALIGN_MASK) & ~CHUNK_ALIGN_MASK)
#define	MIN_LARGE_SIZE   (SIZE_T_ONE << TREEBIN_SHIFT)
#define	MIN_REQUEST   (MIN_CHUNK_SIZE - CHUNK_OVERHEAD - SIZE_T_ONE)
#define	MIN_SMALL_INDEX   (small_index(MIN_CHUNK_SIZE))
#define	minsize_for_tree_index(i)
#define	MMAP_CHUNK_OVERHEAD   (TWO_SIZE_T_SIZES)
#define	MMAP_FLAGS   (MAP_PRIVATE|MAP_ANONYMOUS)
#define	MMAP_FOOT_PAD   (FOUR_SIZE_T_SIZES)
#define	MMAP_PROT   (PROT_READ|PROT_WRITE)
#define	next_chunk(p)   ((mchunkptr)( ((char*)(p)) + ((p)->head & ~INUSE_BITS)))
#define	next_pinuse(p)   ((next_chunk(p)->head) & PINUSE_BIT)
#define	NSMALLBINS   (32U)
#define	NTREEBINS   (32U)
#define	ok_address(M, a)   ((char*)(a) >= (M)->least_addr)
#define	ok_cinuse(p)   cinuse(p)
#define	ok_magic(M)   (1)
#define	ok_next(p, n)   ((char*)(p) < (char*)(n))
#define	ok_pinuse(p)   pinuse(p)
#define	overhead_for(p)   (is_mmapped(p)? MMAP_CHUNK_OVERHEAD : CHUNK_OVERHEAD)
#define	pad_request(req)   (((req) + CHUNK_OVERHEAD + CHUNK_ALIGN_MASK) & ~CHUNK_ALIGN_MASK)
#define	page_align(S)   (((S) + (mparams.page_size)) & ~(mparams.page_size - SIZE_T_ONE))
#define	pinuse(p)   ((p)->head & PINUSE_BIT)
#define	PINUSE_BIT   (SIZE_T_ONE)
#define	POSTACTION(M)
#define	PREACTION(M)   (0)
#define	prev_chunk(p)   ((mchunkptr)( ((char*)(p)) - ((p)->prev_foot) ))
#define	RELEASE_MAGIC_INIT_LOCK()
#define	RELEASE_MORECORE_LOCK()
#define	replace_dv(M, P, S)
#define	request2size(req)   (((req) < MIN_REQUEST)? MIN_CHUNK_SIZE : pad_request(req))
#define	RTCHECK(e)   __builtin_expect(e, 1)
#define	same_or_left_bits(x)   ((x) | -(x))
#define	segment_holds(S, A)   ((char*)(A) >= S->base && (char*)(A) < S->base + S->size)
#define	set_foot(p, s)   (((mchunkptr)((char*)(p) + (s)))->prev_foot = (s))
#define	set_free_with_pinuse(p, s, n)   (clear_pinuse(n), set_size_and_pinuse_of_free_chunk(p, s))
#define	set_inuse(M, p, s)
#define	set_inuse_and_pinuse(M, p, s)
#define	set_lock(M, L)
#define	set_size_and_pinuse_of_free_chunk(p, s)   ((p)->head = (s|PINUSE_BIT), set_foot(p, s))
#define	set_size_and_pinuse_of_inuse_chunk(M, p, s)   ((p)->head = (s|PINUSE_BIT|CINUSE_BIT))
#define	should_trim(M, s)   ((s) > (M)->trim_check)
#define	SIX_SIZE_T_SIZES   (FOUR_SIZE_T_SIZES+TWO_SIZE_T_SIZES)
#define	SIZE_T_BITSIZE   (sizeof(size_t) << 3)
#define	SIZE_T_ONE   ((size_t)1)
#define	SIZE_T_SIZE   (sizeof(size_t))
#define	SIZE_T_TWO   ((size_t)2)
#define	SIZE_T_ZERO   ((size_t)0)
#define	small_index(s)   ((s) >> SMALLBIN_SHIFT)
#define	small_index2size(i)   ((i) << SMALLBIN_SHIFT)
#define	smallbin_at(M, i)   ((sbinptr)((char*)&((M)->smallbins[(i)<<1])))
#define	SMALLBIN_SHIFT   (3U)
#define	SMALLBIN_WIDTH   (SIZE_T_ONE << SMALLBIN_SHIFT)
#define	smallmap_is_marked(M, i)   ((M)->smallmap & idx2bit(i))
#define	TOP_FOOT_SIZE   (align_offset(chunk2mem(0))+pad_request(sizeof(struct malloc_segment))+MIN_CHUNK_SIZE)
#define	treebin_at(M, i)   (&((M)->treebins[i]))
#define	TREEBIN_SHIFT   (8U)
#define	treemap_is_marked(M, i)   ((M)->treemap & idx2bit(i))
#define	TWO_SIZE_T_SIZES   (SIZE_T_SIZE<<1)
#define	unlink_chunk(M, P, S)
#define	unlink_first_small_chunk(M, B, P, I)
#define	unlink_large_chunk(M, X)
#define	unlink_small_chunk(M, P, S)
#define	USAGE_ERROR_ACTION(m, p)   ABORT
#define	use_lock(M)   ((M)->mflags & USE_LOCK_BIT)
#define	USE_LOCK_BIT   (0U)
#define	use_mmap(M)   ((M)->mflags & USE_MMAP_BIT)
#define	USE_MMAP_BIT   (SIZE_T_ONE)
#define	use_noncontiguous(M)   ((M)->mflags & USE_NONCONTIGUOUS_BIT)
#define	USE_NONCONTIGUOUS_BIT   (4U)

Typedefs
typedef unsigned int	bindex_t
typedef unsigned int	binmap_t
typedef unsigned int	flag_t
typedef struct malloc_chunk	mchunk
typedef struct malloc_chunk *	mchunkptr
typedef struct malloc_segment	msegment
typedef struct malloc_segment *	msegmentptr
typedef struct malloc_state *	mstate
typedef struct malloc_chunk *	sbinptr
typedef struct malloc_tree_chunk *	tbinptr
typedef struct malloc_tree_chunk	tchunk
typedef struct malloc_tree_chunk *	tchunkptr

Functions
static void	add_segment (mstate m, char *tbase, size_t tsize, flag_t mmapped)
static int	change_mparam (int param_number, int value)
void *	dlcalloc (size_t n_elements, size_t elem_size)
void	dlfree (void *mem)
void **	dlindependent_calloc (size_t n_elements, size_t elem_size, void *chunks[])
void **	dlindependent_comalloc (size_t n_elements, size_t sizes[], void *chunks[])
struct mallinfo	dlmallinfo (void)
void *	dlmalloc (size_t bytes)
size_t	dlmalloc_footprint (void)
size_t	dlmalloc_max_footprint (void)
void	dlmalloc_stats ()
int	dlmalloc_trim (size_t pad)
size_t	dlmalloc_usable_size (void *mem)
int	dlmallopt (int param_number, int value)
void *	dlmemalign (size_t alignment, size_t bytes)
void *	dlpvalloc (size_t bytes)
void *	dlrealloc (void *oldmem, size_t bytes)
void *	dlvalloc (size_t bytes)
static int	has_segment_link (mstate m, msegmentptr ss)
static void **	ialloc (mstate m, size_t n_elements, size_t *sizes, int opts, void *chunks[])
static void	init_bins (mstate m)
static int	init_mparams (void)
static void	init_top (mstate m, mchunkptr p, size_t psize)
static struct mallinfo	internal_mallinfo (mstate m)
static void	internal_malloc_stats (mstate m)
static void *	internal_memalign (mstate m, size_t alignment, size_t bytes)
static void *	internal_realloc (mstate m, void *oldmem, size_t bytes)
static void *	mmap_alloc (mstate m, size_t nb)
static mchunkptr	mmap_resize (mstate m, mchunkptr oldp, size_t nb)
static void *	prepend_alloc (mstate m, char *newbase, char *oldbase, size_t nb)
static size_t	release_unused_segments (mstate m)
static msegmentptr	segment_holding (mstate m, char *addr)
static void *	sys_alloc (mstate m, size_t nb)
static int	sys_trim (mstate m, size_t pad)
static void *	tmalloc_large (mstate m, size_t nb)
static void *	tmalloc_small (mstate m, size_t nb)

Variables
static struct malloc_state	_gm_
static struct malloc_params	mparams

#define ACQUIRE_MAGIC_INIT_LOCK

(

)

Referenced by init_mparams().

#define ACQUIRE_MORECORE_LOCK

(

)

Referenced by sys_alloc(), and sys_trim().

#define align_as_chunk

(

A

)

(mchunkptr)((A) + align_offset(chunk2mem(A)))

Referenced by internal_mallinfo(), internal_malloc_stats(), prepend_alloc(), and release_unused_segments().

#define align_offset

(

A

)

Value:

((((size_t)(A) & CHUNK_ALIGN_MASK) == 0)? 0 :\
  ((MALLOC_ALIGNMENT - ((size_t)(A) & CHUNK_ALIGN_MASK)) & CHUNK_ALIGN_MASK))

Referenced by add_segment(), init_top(), and mmap_alloc().

#define assert

(

x

)

Referenced by add_segment(), cmd_ping(), dlmalloc(), ialloc(), internal_memalign(), mmap_alloc(), prepend_alloc(), release_unused_segments(), tmalloc_large(), and tmalloc_small().

#define bit_for_tree_index

(

i

)

(i == NTREEBINS-1)? (SIZE_T_BITSIZE-1) : (((i) >> 1) + TREEBIN_SHIFT - 2)

#define CALL_MMAP

(

s

)

mmap(0, (s), MMAP_PROT, MMAP_FLAGS, -1, 0)

Referenced by sys_alloc().

#define CALL_MORECORE

(

S

)

MORECORE(S)

Referenced by sys_alloc(), and sys_trim().

#define CALL_MREMAP	(		addr,
			osz,
			nsz,
			mv
	)		MFAIL

Referenced by mmap_resize(), and sys_trim().

#define CALL_MUNMAP	(		a,
			s
	)		munmap((a), (s))

Referenced by dlfree(), release_unused_segments(), and sys_trim().

#define calloc_must_clear

(

p

)

(!is_mmapped(p))

Referenced by dlcalloc().

#define check_free_chunk	(		M,
			P
	)

Referenced by dlfree(), and prepend_alloc().

#define check_inuse_chunk	(		M,
			P
	)

Referenced by dlfree(), ialloc(), internal_memalign(), and internal_realloc().

#define check_malloc_state

(

M

)

Referenced by internal_mallinfo(), and internal_malloc_stats().

#define check_malloced_chunk	(		M,
			P,
			N
	)

Referenced by dlmalloc(), prepend_alloc(), and sys_alloc().

#define check_mmapped_chunk	(		M,
			P
	)

Referenced by mmap_alloc(), and mmap_resize().

#define check_top_chunk	(		M,
			P
	)

Referenced by add_segment(), dlmalloc(), prepend_alloc(), sys_alloc(), and sys_trim().

#define chunk2mem

(

p

)

((void*)((char*)(p) + TWO_SIZE_T_SIZES))

Referenced by add_segment(), dlmalloc(), ialloc(), init_top(), internal_memalign(), internal_realloc(), mmap_alloc(), prepend_alloc(), sys_alloc(), tmalloc_large(), and tmalloc_small().

#define CHUNK_ALIGN_MASK   (MALLOC_ALIGNMENT - SIZE_T_ONE)

Referenced by add_segment(), mmap_alloc(), and mmap_resize().

#define chunk_minus_offset	(		p,
			s
	)		((mchunkptr)(((char*)(p)) - (s)))

Referenced by dlfree().

#define CHUNK_OVERHEAD   (SIZE_T_SIZE)

Referenced by ialloc(), and internal_memalign().

#define chunk_plus_offset	(		p,
			s
	)		((mchunkptr)(((char*)(p)) + (s)))

Referenced by add_segment(), dlfree(), dlmalloc(), ialloc(), init_top(), internal_memalign(), internal_realloc(), mmap_alloc(), mmap_resize(), prepend_alloc(), sys_alloc(), tmalloc_large(), and tmalloc_small().

#define chunksize

(

p

)

((p)->head & ~(INUSE_BITS))

Referenced by dlfree(), dlmalloc(), dlmalloc_usable_size(), ialloc(), internal_mallinfo(), internal_malloc_stats(), internal_memalign(), internal_realloc(), mmap_resize(), prepend_alloc(), release_unused_segments(), tmalloc_large(), and tmalloc_small().

#define cinuse

(

p

)

((p)->head & CINUSE_BIT)

Referenced by dlfree(), dlmalloc_usable_size(), internal_mallinfo(), internal_malloc_stats(), prepend_alloc(), and release_unused_segments().

#define CINUSE_BIT   (SIZE_T_TWO)

Referenced by internal_memalign(), mmap_alloc(), and mmap_resize().

#define clear_cinuse

(

p

)

((p)->head &= ~CINUSE_BIT)

#define clear_pinuse

(

p

)

((p)->head &= ~PINUSE_BIT)

#define clear_smallmap	(		M,
			i
	)		((M)->smallmap &= ~idx2bit(i))

#define clear_treemap	(		M,
			i
	)		((M)->treemap &= ~idx2bit(i))

#define CMFAIL   ((char*)(MFAIL)) /* defined for convenience */

Referenced by mmap_alloc(), mmap_resize(), sys_alloc(), and sys_trim().

#define compute_bit2idx	(		X,
			I
	)

Value:

{\
  unsigned int Y = X - 1;\
  unsigned int K = Y >> (16-4) & 16;\
  unsigned int N = K;        Y >>= K;\
  N += K = Y >> (8-3) &  8;  Y >>= K;\
  N += K = Y >> (4-2) &  4;  Y >>= K;\
  N += K = Y >> (2-1) &  2;  Y >>= K;\
  N += K = Y >> (1-0) &  1;  Y >>= K;\
  I = (bindex_t)(N + Y);\
}

Referenced by dlmalloc(), tmalloc_large(), and tmalloc_small().

#define compute_tree_index	(		S,
			I
	)

Value:

{\
  size_t X = S >> TREEBIN_SHIFT;\
  if (X == 0)\
    I = 0;\
  else if (X > 0xFFFF)\
    I = NTREEBINS-1;\
  else {\
    unsigned int Y = (unsigned int)X;\
    unsigned int N = ((Y - 0x100) >> 16) & 8;\
    unsigned int K = (((Y <<= N) - 0x1000) >> 16) & 4;\
    N += K;\
    N += K = (((Y <<= K) - 0x4000) >> 16) & 2;\
    K = 14 - N + ((Y <<= K) >> 15);\
    I = (K << 1) + ((S >> (K + (TREEBIN_SHIFT-1)) & 1));\
  }\
}

Referenced by tmalloc_large().

#define CORRUPTION_ERROR_ACTION

(

m

)

ABORT

Referenced by tmalloc_large(), and tmalloc_small().

#define DIRECT_MMAP

(

s

)

CALL_MMAP(s)

Referenced by mmap_alloc().

#define disable_contiguous

(

M

)

((M)->mflags |= USE_NONCONTIGUOUS_BIT)

Referenced by sys_alloc().

#define disable_lock

(

M

)

((M)->mflags &= ~USE_LOCK_BIT)

#define disable_mmap

(

M

)

((M)->mflags &= ~USE_MMAP_BIT)

Referenced by ialloc().

#define enable_lock

(

M

)

((M)->mflags |= USE_LOCK_BIT)

#define enable_mmap

(

M

)

((M)->mflags |= USE_MMAP_BIT)

Referenced by ialloc().

#define EXTERN_BIT   (8U)

#define FENCEPOST_HEAD   (INUSE_BITS|SIZE_T_SIZE)

Referenced by add_segment(), internal_mallinfo(), internal_malloc_stats(), mmap_alloc(), and mmap_resize().

#define fm   gm

Referenced by dlfree().

#define FOUR_SIZE_T_SIZES   (SIZE_T_SIZE<<2)

Referenced by add_segment().

#define get_foot	(		p,
			s
	)		(((mchunkptr)((char*)(p) + (s)))->prev_foot)

#define gm   (&_gm_)

Referenced by dlindependent_calloc(), dlindependent_comalloc(), dlmallinfo(), dlmalloc(), dlmalloc_footprint(), dlmalloc_max_footprint(), dlmalloc_stats(), dlmalloc_trim(), dlmemalign(), dlrealloc(), and init_mparams().

#define granularity_align

(

S

)

(((S) + (mparams.granularity)) & ~(mparams.granularity - SIZE_T_ONE))

Referenced by mmap_alloc(), mmap_resize(), and sys_alloc().

#define HALF_MAX_SIZE_T   (MAX_SIZE_T / 2U)

Referenced by sys_alloc(), and sys_trim().

#define idx2bit

(

i

)

((binmap_t)(1) << (i))

Referenced by dlmalloc(), and tmalloc_large().

#define INITIAL_LOCK

(

l

)

Referenced by init_mparams().

#define insert_chunk	(		M,
			P,
			S
	)

Value:

if (is_small(S)) insert_small_chunk(M, P, S)\
  else { tchunkptr TP = (tchunkptr)(P); insert_large_chunk(M, TP, S); }

Referenced by add_segment(), dlfree(), prepend_alloc(), and tmalloc_large().

#define insert_large_chunk	(		M,
			X,
			S
	)

Referenced by release_unused_segments().

#define insert_small_chunk	(		M,
			P,
			S
	)

Value:

{\
  bindex_t I  = small_index(S);\
  mchunkptr B = smallbin_at(M, I);\
  mchunkptr F = B;\
  assert(S >= MIN_CHUNK_SIZE);\
  if (!smallmap_is_marked(M, I))\
    mark_smallmap(M, I);\
  else if (RTCHECK(ok_address(M, B->fd)))\
    F = B->fd;\
  else {\
    CORRUPTION_ERROR_ACTION(M);\
  }\
  B->fd = P;\
  F->bk = P;\
  P->fd = F;\
  P->bk = B;\
}

#define internal_free	(		m,
			mem
	)		dlfree(mem)

Referenced by internal_memalign(), and internal_realloc().

#define internal_malloc	(		m,
			b
	)		dlmalloc(b)

Referenced by ialloc(), internal_memalign(), and internal_realloc().

#define INUSE_BITS   (PINUSE_BIT|CINUSE_BIT)

Referenced by dlfree().

#define is_aligned

(

A

)

(((size_t)((A)) & (CHUNK_ALIGN_MASK)) == 0)

Referenced by add_segment(), and mmap_alloc().

#define is_extern_segment

(

S

)

((S)->sflags & EXTERN_BIT)

Referenced by release_unused_segments(), sys_alloc(), and sys_trim().

#define is_global

(

M

)

((M) == &_gm_)

Referenced by sys_alloc().

#define is_granularity_aligned

(

S

)

(((size_t)(S) & (mparams.granularity - SIZE_T_ONE)) == 0)

#define is_initialized

(

M

)

((M)->top != 0)

Referenced by internal_mallinfo(), internal_malloc_stats(), sys_alloc(), and sys_trim().

#define is_mmapped

(

p

)

(!((p)->head & PINUSE_BIT) && ((p)->prev_foot & IS_MMAPPED_BIT))

Referenced by ialloc(), internal_memalign(), and internal_realloc().

#define IS_MMAPPED_BIT   (SIZE_T_ONE)

Referenced by dlfree(), mmap_alloc(), mmap_resize(), and sys_alloc().

#define is_mmapped_segment

(

S

)

((S)->sflags & IS_MMAPPED_BIT)

Referenced by release_unused_segments(), and sys_trim().

#define is_page_aligned

(

S

)

(((size_t)(S) & (mparams.page_size - SIZE_T_ONE)) == 0)

Referenced by sys_alloc().

#define is_small

(

s

)

(((s) >> SMALLBIN_SHIFT) < NSMALLBINS)

Referenced by mmap_resize().

#define least_bit

(

x

)

((x) & -(x))

Referenced by dlmalloc(), tmalloc_large(), and tmalloc_small().

#define left_bits

(

x

)

((x<<1) | -(x<<1))

Referenced by dlmalloc(), and tmalloc_large().

#define leftmost_child

(

t

)

((t)->child[0] != 0? (t)->child[0] : (t)->child[1])

Referenced by tmalloc_large(), and tmalloc_small().

#define leftshift_for_tree_index

(

i

)

Value:

((i == NTREEBINS-1)? 0 : \
    ((SIZE_T_BITSIZE-SIZE_T_ONE) - (((i) >> 1) + TREEBIN_SHIFT - 2)))

Referenced by tmalloc_large().

#define malloc_getpagesize   ((size_t)4096U)

Referenced by init_mparams().

#define mark_inuse_foot	(		M,
			p,
			s
	)

Referenced by mmap_alloc(), and mmap_resize().

#define mark_smallmap	(		M,
			i
	)		((M)->smallmap |= idx2bit(i))

#define mark_treemap	(		M,
			i
	)		((M)->treemap |= idx2bit(i))

#define MAX_REQUEST   ((-MIN_CHUNK_SIZE) << 2)

Referenced by dlmalloc(), internal_memalign(), internal_realloc(), and sys_trim().

#define MAX_SMALL_REQUEST   (MAX_SMALL_SIZE - CHUNK_ALIGN_MASK - CHUNK_OVERHEAD)

Referenced by dlmalloc().

#define MAX_SMALL_SIZE   (MIN_LARGE_SIZE - SIZE_T_ONE)

#define MCHUNK_SIZE   (sizeof(mchunk))

Referenced by init_mparams().

#define mem2chunk

(

mem

)

((mchunkptr)((char*)(mem) - TWO_SIZE_T_SIZES))

Referenced by dlcalloc(), dlfree(), dlmalloc_usable_size(), dlrealloc(), ialloc(), internal_memalign(), internal_realloc(), and sys_alloc().

#define MFAIL   ((void*)(MAX_SIZE_T))

Referenced by sys_trim().

#define MIN_CHUNK_SIZE   ((MCHUNK_SIZE + CHUNK_ALIGN_MASK) & ~CHUNK_ALIGN_MASK)

Referenced by add_segment(), dlmalloc(), init_mparams(), internal_memalign(), internal_realloc(), prepend_alloc(), tmalloc_large(), and tmalloc_small().

#define MIN_LARGE_SIZE   (SIZE_T_ONE << TREEBIN_SHIFT)

#define MIN_REQUEST   (MIN_CHUNK_SIZE - CHUNK_OVERHEAD - SIZE_T_ONE)

Referenced by dlmalloc().

#define MIN_SMALL_INDEX   (small_index(MIN_CHUNK_SIZE))

#define minsize_for_tree_index

(

i

)

Value:

((SIZE_T_ONE << (((i) >> 1) + TREEBIN_SHIFT)) |  \
   (((size_t)((i) & SIZE_T_ONE)) << (((i) >> 1) + TREEBIN_SHIFT - 1)))

#define MMAP_CHUNK_OVERHEAD   (TWO_SIZE_T_SIZES)

#define MMAP_FLAGS   (MAP_PRIVATE|MAP_ANONYMOUS)

#define MMAP_FOOT_PAD   (FOUR_SIZE_T_SIZES)

Referenced by dlfree(), mmap_alloc(), and mmap_resize().

#define MMAP_PROT   (PROT_READ|PROT_WRITE)

#define next_chunk

(

p

)

((mchunkptr)( ((char*)(p)) + ((p)->head & ~INUSE_BITS)))

Referenced by internal_mallinfo(), internal_malloc_stats(), and sys_alloc().

#define next_pinuse

(

p

)

((next_chunk(p)->head) & PINUSE_BIT)

#define NSMALLBINS   (32U)

Referenced by init_bins().

#define NTREEBINS   (32U)

#define ok_address	(		M,
			a
	)		((char*)(a) >= (M)->least_addr)

Referenced by dlfree(), internal_realloc(), tmalloc_large(), and tmalloc_small().

#define ok_cinuse

(

p

)

cinuse(p)

Referenced by dlfree(), and internal_realloc().

#define ok_magic

(

M

)

(1)

Referenced by dlfree(), and dlrealloc().

#define ok_next	(		p,
			n
	)		((char*)(p) < (char*)(n))

Referenced by dlfree(), internal_realloc(), tmalloc_large(), and tmalloc_small().

#define ok_pinuse

(

p

)

pinuse(p)

Referenced by dlfree(), and internal_realloc().

#define overhead_for

(

p

)

(is_mmapped(p)? MMAP_CHUNK_OVERHEAD : CHUNK_OVERHEAD)

Referenced by dlmalloc_usable_size(), and internal_realloc().

#define pad_request

(

req

)

(((req) + CHUNK_OVERHEAD + CHUNK_ALIGN_MASK) & ~CHUNK_ALIGN_MASK)

Referenced by add_segment(), and dlmalloc().

#define page_align

(

S

)

(((S) + (mparams.page_size)) & ~(mparams.page_size - SIZE_T_ONE))

Referenced by sys_alloc().

#define pinuse

(

p

)

((p)->head & PINUSE_BIT)

Referenced by dlfree(), and prepend_alloc().

#define PINUSE_BIT   (SIZE_T_ONE)

Referenced by dlfree(), dlmalloc(), init_top(), internal_realloc(), prepend_alloc(), and sys_alloc().

#define POSTACTION

(

M

)

Referenced by dlfree(), dlmalloc(), dlmalloc_trim(), ialloc(), internal_mallinfo(), internal_malloc_stats(), internal_memalign(), and internal_realloc().

#define PREACTION

(

M

)

(0)

Referenced by dlfree(), dlmalloc(), dlmalloc_trim(), ialloc(), internal_mallinfo(), internal_malloc_stats(), internal_memalign(), and internal_realloc().

#define prev_chunk

(

p

)

((mchunkptr)( ((char*)(p)) - ((p)->prev_foot) ))

#define RELEASE_MAGIC_INIT_LOCK

(

)

Referenced by init_mparams().

#define RELEASE_MORECORE_LOCK

(

)

Referenced by sys_alloc(), and sys_trim().

#define replace_dv	(		M,
			P,
			S
	)

Value:

{\
  size_t DVS = M->dvsize;\
  if (DVS != 0) {\
    mchunkptr DV = M->dv;\
    assert(is_small(DVS));\
    insert_small_chunk(M, DV, DVS);\
  }\
  M->dvsize = S;\
  M->dv = P;\
}

Referenced by dlmalloc(), and tmalloc_small().

#define request2size

(

req

)

(((req) < MIN_REQUEST)? MIN_CHUNK_SIZE : pad_request(req))

Referenced by ialloc(), internal_memalign(), and internal_realloc().

#define RTCHECK

(

e

)

__builtin_expect(e, 1)

Referenced by dlfree(), internal_realloc(), tmalloc_large(), and tmalloc_small().

#define same_or_left_bits

(

x

)

((x) | -(x))

#define segment_holds	(		S,
			A
	)		((char*)(A) >= S->base && (char*)(A) < S->base + S->size)

Referenced by internal_mallinfo(), internal_malloc_stats(), release_unused_segments(), and sys_alloc().

#define set_foot	(		p,
			s
	)		(((mchunkptr)((char*)(p) + (s)))->prev_foot = (s))

#define set_free_with_pinuse	(		p,
			s,
			n
	)		(clear_pinuse(n), set_size_and_pinuse_of_free_chunk(p, s))

Referenced by add_segment(), dlfree(), and prepend_alloc().

#define set_inuse	(		M,
			p,
			s
	)

Value:

((p)->head = (((p)->head & PINUSE_BIT)|s|CINUSE_BIT),\
  ((mchunkptr)(((char*)(p)) + (s)))->head |= PINUSE_BIT)

Referenced by internal_memalign(), and internal_realloc().

#define set_inuse_and_pinuse	(		M,
			p,
			s
	)

Value:

((p)->head = (s|PINUSE_BIT|CINUSE_BIT),\
  ((mchunkptr)(((char*)(p)) + (s)))->head |= PINUSE_BIT)

Referenced by dlmalloc(), tmalloc_large(), and tmalloc_small().

#define set_lock	(		M,
			L
	)

Value:

((M)->mflags = (L)?\
  ((M)->mflags | USE_LOCK_BIT) :\
  ((M)->mflags & ~USE_LOCK_BIT))

#define set_size_and_pinuse_of_free_chunk	(		p,
			s
	)		((p)->head = (s|PINUSE_BIT), set_foot(p, s))

Referenced by dlfree(), dlmalloc(), prepend_alloc(), tmalloc_large(), and tmalloc_small().

#define set_size_and_pinuse_of_inuse_chunk	(		M,
			p,
			s
	)		((p)->head = (s|PINUSE_BIT|CINUSE_BIT))

Referenced by add_segment(), dlmalloc(), ialloc(), prepend_alloc(), sys_alloc(), tmalloc_large(), and tmalloc_small().

#define should_trim	(		M,
			s
	)		((s) > (M)->trim_check)

Referenced by dlfree().

#define SIX_SIZE_T_SIZES   (FOUR_SIZE_T_SIZES+TWO_SIZE_T_SIZES)

Referenced by mmap_alloc(), and mmap_resize().

#define SIZE_T_BITSIZE   (sizeof(size_t) << 3)

Referenced by tmalloc_large().

#define SIZE_T_ONE   ((size_t)1)

Referenced by dlpvalloc(), init_mparams(), internal_mallinfo(), internal_memalign(), sys_alloc(), sys_trim(), and tmalloc_large().

#define SIZE_T_SIZE   (sizeof(size_t))

Referenced by add_segment(), dlmalloc(), ialloc(), mmap_alloc(), and mmap_resize().

#define SIZE_T_TWO   ((size_t)2)

#define SIZE_T_ZERO   ((size_t)0)

#define small_index

(

s

)

((s) >> SMALLBIN_SHIFT)

Referenced by dlmalloc().

#define small_index2size

(

i

)

((i) << SMALLBIN_SHIFT)

Referenced by dlmalloc().

#define smallbin_at	(		M,
			i
	)		((sbinptr)((char*)&((M)->smallbins[(i)<<1])))

Referenced by dlmalloc(), and init_bins().

#define SMALLBIN_SHIFT   (3U)

#define SMALLBIN_WIDTH   (SIZE_T_ONE << SMALLBIN_SHIFT)

#define smallmap_is_marked	(		M,
			i
	)		((M)->smallmap & idx2bit(i))

#define TOP_FOOT_SIZE   (align_offset(chunk2mem(0))+pad_request(sizeof(struct malloc_segment))+MIN_CHUNK_SIZE)

Referenced by add_segment(), init_top(), internal_mallinfo(), internal_malloc_stats(), release_unused_segments(), sys_alloc(), and sys_trim().

#define treebin_at	(		M,
			i
	)		(&((M)->treebins[i]))

Referenced by tmalloc_large(), and tmalloc_small().

#define TREEBIN_SHIFT   (8U)

#define treemap_is_marked	(		M,
			i
	)		((M)->treemap & idx2bit(i))

#define TWO_SIZE_T_SIZES   (SIZE_T_SIZE<<1)

#define unlink_chunk	(		M,
			P,
			S
	)

Value:

if (is_small(S)) unlink_small_chunk(M, P, S)\
  else { tchunkptr TP = (tchunkptr)(P); unlink_large_chunk(M, TP); }

Referenced by dlfree(), and prepend_alloc().

#define unlink_first_small_chunk	(		M,
			B,
			P,
			I
	)

Value:

{\
  mchunkptr F = P->fd;\
  assert(P != B);\
  assert(P != F);\
  assert(chunksize(P) == small_index2size(I));\
  if (B == F)\
    clear_smallmap(M, I);\
  else if (RTCHECK(ok_address(M, F))) {\
    B->fd = F;\
    F->bk = B;\
  }\
  else {\
    CORRUPTION_ERROR_ACTION(M);\
  }\
}

Referenced by dlmalloc().

#define unlink_large_chunk	(		M,
			X
	)

Referenced by release_unused_segments(), tmalloc_large(), and tmalloc_small().

#define unlink_small_chunk	(		M,
			P,
			S
	)

Value:

{\
  mchunkptr F = P->fd;\
  mchunkptr B = P->bk;\
  bindex_t I = small_index(S);\
  assert(P != B);\
  assert(P != F);\
  assert(chunksize(P) == small_index2size(I));\
  if (F == B)\
    clear_smallmap(M, I);\
  else if (RTCHECK((F == smallbin_at(M,I) || ok_address(M, F)) &&\
                   (B == smallbin_at(M,I) || ok_address(M, B)))) {\
    F->bk = B;\
    B->fd = F;\
  }\
  else {\
    CORRUPTION_ERROR_ACTION(M);\
  }\
}

#define USAGE_ERROR_ACTION	(		m,
			p
	)		ABORT

Referenced by dlfree(), dlrealloc(), and internal_realloc().

#define use_lock

(

M

)

((M)->mflags & USE_LOCK_BIT)

#define USE_LOCK_BIT   (0U)

Referenced by init_mparams().

#define use_mmap

(

M

)

((M)->mflags & USE_MMAP_BIT)

Referenced by ialloc(), and sys_alloc().

#define USE_MMAP_BIT   (SIZE_T_ONE)

Referenced by init_mparams().

#define use_noncontiguous

(

M

)

((M)->mflags & USE_NONCONTIGUOUS_BIT)

Referenced by sys_alloc().

#define USE_NONCONTIGUOUS_BIT   (4U)

Referenced by init_mparams().

typedef unsigned int bindex_t

typedef unsigned int binmap_t

typedef unsigned int flag_t

typedef struct malloc_chunk mchunk

typedef struct malloc_chunk* mchunkptr

typedef struct malloc_segment msegment

typedef struct malloc_segment* msegmentptr

typedef struct malloc_state* mstate

typedef struct malloc_chunk* sbinptr

typedef struct malloc_tree_chunk* tbinptr

typedef struct malloc_tree_chunk tchunk

typedef struct malloc_tree_chunk* tchunkptr

static void add_segment ( mstate  m, char *  tbase, size_t  tsize, flag_t  mmapped  )

static

References align_offset, assert, malloc_segment::base, check_top_chunk, chunk2mem, CHUNK_ALIGN_MASK, chunk_plus_offset, FENCEPOST_HEAD, FOUR_SIZE_T_SIZES, malloc_chunk::head, init_top(), insert_chunk, is_aligned, MIN_CHUNK_SIZE, malloc_segment::next, pad_request, malloc_state::seg, segment_holding(), set_free_with_pinuse, set_size_and_pinuse_of_inuse_chunk, malloc_segment::sflags, malloc_segment::size, SIZE_T_SIZE, malloc_state::top, and TOP_FOOT_SIZE.

Referenced by sys_alloc().

static int change_mparam ( int  param_number, int  value  )

static

References malloc_params::granularity, init_mparams(), M_GRANULARITY, M_MMAP_THRESHOLD, M_TRIM_THRESHOLD, malloc_params::mmap_threshold, mparams, malloc_params::page_size, malloc_params::trim_threshold, and val.

Referenced by dlmallopt().

void* dlcalloc	(	size_t	n_elements,
		size_t	elem_size
	)

References calloc_must_clear, dlmalloc, MAX_SIZE_T, and mem2chunk.

void dlfree

(

void *

mem

)

References CALL_MUNMAP, check_free_chunk, check_inuse_chunk, chunk_minus_offset, chunk_plus_offset, chunksize, cinuse, malloc_state::dv, malloc_state::dvsize, fm, malloc_state::footprint, malloc_chunk::head, insert_chunk, INUSE_BITS, IS_MMAPPED_BIT, mem2chunk, MMAP_FOOT_PAD, ok_address, ok_cinuse, ok_magic, ok_next, ok_pinuse, pinuse, PINUSE_BIT, POSTACTION, PREACTION, malloc_chunk::prev_foot, RTCHECK, set_free_with_pinuse, set_size_and_pinuse_of_free_chunk, should_trim, sys_trim(), malloc_state::top, malloc_state::topsize, unlink_chunk, and USAGE_ERROR_ACTION.

void** dlindependent_calloc	(	size_t	n_elements,
		size_t	elem_size,
		void *	chunks[]
	)

References gm, and ialloc().

void** dlindependent_comalloc	(	size_t	n_elements,
		size_t	sizes[],
		void *	chunks[]
	)

References gm, and ialloc().

struct mallinfo dlmallinfo

(

void

)

References gm, and internal_mallinfo().

void* dlmalloc

(

size_t

bytes

)

References assert, b, check_malloced_chunk, check_top_chunk, chunk2mem, chunk_plus_offset, chunksize, compute_bit2idx, malloc_chunk::fd, gm, malloc_chunk::head, i, idx2bit, least_bit, left_bits, MAX_REQUEST, MAX_SIZE_T, MAX_SMALL_REQUEST, MIN_CHUNK_SIZE, MIN_REQUEST, pad_request, PINUSE_BIT, POSTACTION, PREACTION, replace_dv, set_inuse_and_pinuse, set_size_and_pinuse_of_free_chunk, set_size_and_pinuse_of_inuse_chunk, SIZE_T_SIZE, small_index, small_index2size, smallbin_at, sys_alloc(), tmalloc_large(), tmalloc_small(), and unlink_first_small_chunk.

size_t dlmalloc_footprint

(

void

)

References gm.

size_t dlmalloc_max_footprint

(

void

)

References gm.

void dlmalloc_stats

(

void

)

References gm, and internal_malloc_stats().

int dlmalloc_trim

(

size_t

pad

)

References gm, POSTACTION, PREACTION, and sys_trim().

size_t dlmalloc_usable_size

(

void *

mem

)

References chunksize, cinuse, mem2chunk, and overhead_for.

int dlmallopt	(	int	param_number,
		int	value
	)

References change_mparam().

void* dlmemalign	(	size_t	alignment,
		size_t	bytes
	)

References gm, and internal_memalign().

void* dlpvalloc

(

size_t

bytes

)

References dlmemalign, init_mparams(), mparams, malloc_params::page_size, and SIZE_T_ONE.

void* dlrealloc	(	void *	oldmem,
		size_t	bytes
	)

References dlfree, dlmalloc, gm, internal_realloc(), mem2chunk, ok_magic, and USAGE_ERROR_ACTION.

void* dlvalloc

(

size_t

bytes

)

References dlmemalign, init_mparams(), mparams, and malloc_params::page_size.

static int has_segment_link ( mstate  m, msegmentptr  ss  )

static

References malloc_segment::base, malloc_segment::next, malloc_state::seg, and malloc_segment::size.

Referenced by sys_trim().

static void** ialloc ( mstate  m, size_t  n_elements, size_t *  sizes, int  opts, void *  chunks[]  )

static

References assert, check_inuse_chunk, chunk2mem, CHUNK_OVERHEAD, chunk_plus_offset, chunksize, disable_mmap, enable_mmap, i, internal_malloc, is_mmapped, mem2chunk, POSTACTION, PREACTION, request2size, set_size_and_pinuse_of_inuse_chunk, SIZE_T_SIZE, and use_mmap.

Referenced by dlindependent_calloc(), and dlindependent_comalloc().

static void init_bins ( mstate  m )

static

References malloc_chunk::bk, malloc_chunk::fd, i, NSMALLBINS, and smallbin_at.

Referenced by sys_alloc().

static int init_mparams ( void  )

static

References ABORT, ACQUIRE_MAGIC_INIT_LOCK, buf, close(), DEFAULT_GRANULARITY, malloc_params::default_mflags, DEFAULT_MMAP_THRESHOLD, DEFAULT_TRIM_THRESHOLD, gm, malloc_params::granularity, INITIAL_LOCK, malloc_params::magic, MALLOC_ALIGNMENT, malloc_getpagesize, MAX_SIZE_T, MCHUNK_SIZE, MIN_CHUNK_SIZE, malloc_params::mmap_threshold, mparams, O_RDONLY, open(), malloc_params::page_size, read(), RELEASE_MAGIC_INIT_LOCK, s, SIZE_T_ONE, malloc_params::trim_threshold, USE_LOCK_BIT, USE_MMAP_BIT, and USE_NONCONTIGUOUS_BIT.

Referenced by change_mparam(), dlpvalloc(), dlvalloc(), and sys_alloc().

static void init_top ( mstate  m, mchunkptr  p, size_t  psize  )

static

References align_offset, chunk2mem, chunk_plus_offset, malloc_chunk::head, mparams, PINUSE_BIT, malloc_state::top, TOP_FOOT_SIZE, malloc_state::topsize, malloc_state::trim_check, and malloc_params::trim_threshold.

Referenced by add_segment(), sys_alloc(), and sys_trim().

static struct mallinfo internal_mallinfo ( mstate  m )

static

References align_as_chunk, mallinfo::arena, malloc_segment::base, check_malloc_state, chunksize, cinuse, FENCEPOST_HEAD, malloc_state::footprint, mallinfo::fordblks, mallinfo::hblkhd, malloc_chunk::head, is_initialized, mallinfo::keepcost, malloc_state::max_footprint, malloc_segment::next, next_chunk, mallinfo::ordblks, POSTACTION, PREACTION, malloc_state::seg, segment_holds, SIZE_T_ONE, malloc_state::top, TOP_FOOT_SIZE, malloc_state::topsize, mallinfo::uordblks, and mallinfo::usmblks.

Referenced by dlmallinfo().

static void internal_malloc_stats ( mstate  m )

static

References align_as_chunk, malloc_segment::base, check_malloc_state, chunksize, cinuse, FENCEPOST_HEAD, malloc_state::footprint, fprintf(), malloc_chunk::head, is_initialized, malloc_state::max_footprint, malloc_segment::next, next_chunk, POSTACTION, PREACTION, malloc_state::seg, segment_holds, malloc_state::top, TOP_FOOT_SIZE, and malloc_state::topsize.

Referenced by dlmalloc_stats().

static void* internal_memalign ( mstate  m, size_t  alignment, size_t  bytes  )

static

References a(), assert, check_inuse_chunk, chunk2mem, CHUNK_OVERHEAD, chunk_plus_offset, chunksize, CINUSE_BIT, malloc_chunk::head, internal_free, internal_malloc, is_mmapped, MALLOC_ALIGNMENT, MALLOC_FAILURE_ACTION, MAX_REQUEST, mem2chunk, MIN_CHUNK_SIZE, POSTACTION, PREACTION, malloc_chunk::prev_foot, request2size, set_inuse, and SIZE_T_ONE.

Referenced by dlmemalign().

static void* internal_realloc ( mstate  m, void *  oldmem, size_t  bytes  )

static

References check_inuse_chunk, chunk2mem, chunk_plus_offset, chunksize, malloc_chunk::head, internal_free, internal_malloc, is_mmapped, MALLOC_FAILURE_ACTION, MAX_REQUEST, mem2chunk, MIN_CHUNK_SIZE, mmap_resize(), ok_address, ok_cinuse, ok_next, ok_pinuse, overhead_for, PINUSE_BIT, POSTACTION, PREACTION, request2size, RTCHECK, set_inuse, malloc_state::top, malloc_state::topsize, and USAGE_ERROR_ACTION.

Referenced by dlrealloc().

static void* mmap_alloc ( mstate  m, size_t  nb  )

static

References align_offset, assert, check_mmapped_chunk, chunk2mem, CHUNK_ALIGN_MASK, chunk_plus_offset, CINUSE_BIT, CMFAIL, DIRECT_MMAP, FENCEPOST_HEAD, malloc_state::footprint, granularity_align, is_aligned, IS_MMAPPED_BIT, malloc_state::least_addr, mark_inuse_foot, malloc_state::max_footprint, MMAP_FOOT_PAD, malloc_chunk::prev_foot, SIX_SIZE_T_SIZES, and SIZE_T_SIZE.

Referenced by sys_alloc().

static mchunkptr mmap_resize ( mstate  m, mchunkptr  oldp, size_t  nb  )

static

References CALL_MREMAP, check_mmapped_chunk, CHUNK_ALIGN_MASK, chunk_plus_offset, chunksize, CINUSE_BIT, CMFAIL, FENCEPOST_HEAD, malloc_state::footprint, malloc_params::granularity, granularity_align, malloc_chunk::head, IS_MMAPPED_BIT, is_small, malloc_state::least_addr, mark_inuse_foot, malloc_state::max_footprint, MMAP_FOOT_PAD, mparams, malloc_chunk::prev_foot, SIX_SIZE_T_SIZES, and SIZE_T_SIZE.

Referenced by internal_realloc().

static void* prepend_alloc ( mstate  m, char *  newbase, char *  oldbase, size_t  nb  )

static

References align_as_chunk, assert, check_free_chunk, check_malloced_chunk, check_top_chunk, chunk2mem, chunk_plus_offset, chunksize, cinuse, malloc_state::dv, malloc_state::dvsize, malloc_chunk::head, insert_chunk, MIN_CHUNK_SIZE, pinuse, PINUSE_BIT, set_free_with_pinuse, set_size_and_pinuse_of_free_chunk, set_size_and_pinuse_of_inuse_chunk, malloc_state::top, malloc_state::topsize, and unlink_chunk.

Referenced by sys_alloc().

static size_t release_unused_segments ( mstate  m )

static

References align_as_chunk, assert, malloc_segment::base, CALL_MUNMAP, chunksize, cinuse, malloc_state::dv, malloc_state::dvsize, malloc_state::footprint, insert_large_chunk, is_extern_segment, is_mmapped_segment, malloc_segment::next, malloc_state::seg, segment_holds, malloc_segment::size, TOP_FOOT_SIZE, and unlink_large_chunk.

Referenced by sys_trim().

static msegmentptr segment_holding ( mstate  m, char *  addr  )

static

References malloc_segment::base, malloc_segment::next, malloc_state::seg, and malloc_segment::size.

Referenced by add_segment(), sys_alloc(), and sys_trim().

static void* sys_alloc ( mstate  m, size_t  nb  )

static

References ACQUIRE_MORECORE_LOCK, add_segment(), malloc_segment::base, CALL_MMAP, CALL_MORECORE, check_malloced_chunk, check_top_chunk, chunk2mem, chunk_plus_offset, CMFAIL, disable_contiguous, end, malloc_state::footprint, granularity_align, HALF_MAX_SIZE_T, HAVE_MMAP, HAVE_MORECORE, malloc_chunk::head, init_bins(), init_mparams(), init_top(), is_extern_segment, is_global, is_initialized, IS_MMAPPED_BIT, is_page_aligned, malloc_state::least_addr, malloc_state::magic, malloc_params::magic, MALLOC_FAILURE_ACTION, malloc_state::max_footprint, mem2chunk, mmap_alloc(), malloc_params::mmap_threshold, MORECORE_CONTIGUOUS, mparams, malloc_segment::next, next_chunk, page_align, PINUSE_BIT, prepend_alloc(), RELEASE_MORECORE_LOCK, malloc_state::seg, segment_holding(), segment_holds, set_size_and_pinuse_of_inuse_chunk, malloc_segment::sflags, malloc_segment::size, SIZE_T_ONE, malloc_state::top, TOP_FOOT_SIZE, malloc_state::topsize, use_mmap, and use_noncontiguous.

Referenced by dlmalloc().

static int sys_trim ( mstate  m, size_t  pad  )

static

References ACQUIRE_MORECORE_LOCK, malloc_segment::base, CALL_MORECORE, CALL_MREMAP, CALL_MUNMAP, check_top_chunk, CMFAIL, malloc_state::footprint, malloc_params::granularity, HALF_MAX_SIZE_T, has_segment_link(), HAVE_MMAP, HAVE_MORECORE, init_top(), is_extern_segment, is_initialized, is_mmapped_segment, MAX_REQUEST, MAX_SIZE_T, MFAIL, mparams, RELEASE_MORECORE_LOCK, release_unused_segments(), segment_holding(), malloc_segment::size, SIZE_T_ONE, malloc_state::top, TOP_FOOT_SIZE, malloc_state::topsize, and malloc_state::trim_check.

Referenced by dlfree(), and dlmalloc_trim().

static void* tmalloc_large ( mstate  m, size_t  nb  )

static

References assert, malloc_tree_chunk::child, chunk2mem, chunk_plus_offset, chunksize, compute_bit2idx, compute_tree_index, CORRUPTION_ERROR_ACTION, malloc_state::dvsize, i, idx2bit, insert_chunk, least_bit, left_bits, leftmost_child, leftshift_for_tree_index, MIN_CHUNK_SIZE, ok_address, ok_next, RTCHECK, set_inuse_and_pinuse, set_size_and_pinuse_of_free_chunk, set_size_and_pinuse_of_inuse_chunk, SIZE_T_BITSIZE, SIZE_T_ONE, treebin_at, malloc_state::treemap, and unlink_large_chunk.

Referenced by dlmalloc().

static void* tmalloc_small ( mstate  m, size_t  nb  )

static

References assert, chunk2mem, chunk_plus_offset, chunksize, compute_bit2idx, CORRUPTION_ERROR_ACTION, i, least_bit, leftmost_child, MIN_CHUNK_SIZE, ok_address, ok_next, replace_dv, RTCHECK, set_inuse_and_pinuse, set_size_and_pinuse_of_free_chunk, set_size_and_pinuse_of_inuse_chunk, treebin_at, malloc_state::treemap, and unlink_large_chunk.

Referenced by dlmalloc().

struct malloc_state _gm_

static

struct malloc_params mparams

static

Referenced by change_mparam(), dlpvalloc(), dlvalloc(), init_mparams(), init_top(), mmap_resize(), sys_alloc(), and sys_trim().