version 1.19, 2008/06/23 10:46:25 |
version 1.29, 2013/09/12 15:35:15 |
Line 288 __strerror_r(int e, char *s, size_t l) |
|
Line 288 __strerror_r(int e, char *s, size_t l) |
|
# define SIZEOF_INT_2POW 2 |
# define SIZEOF_INT_2POW 2 |
#endif |
#endif |
|
|
/* We can't use TLS in non-PIC programs, since TLS relies on loader magic. */ |
|
#if (!defined(PIC) && !defined(NO_TLS)) |
|
# define NO_TLS |
|
#endif |
|
|
|
/* |
/* |
* Size and alignment of memory chunks that are allocated by the OS's virtual |
* Size and alignment of memory chunks that are allocated by the OS's virtual |
* memory system. |
* memory system. |
Line 319 __strerror_r(int e, char *s, size_t l) |
|
Line 314 __strerror_r(int e, char *s, size_t l) |
|
#define SMALL_MAX_DEFAULT (1 << SMALL_MAX_2POW_DEFAULT) |
#define SMALL_MAX_DEFAULT (1 << SMALL_MAX_2POW_DEFAULT) |
|
|
/* |
/* |
* Maximum desired run header overhead. Runs are sized as small as possible |
* RUN_MAX_OVRHD indicates maximum desired run header overhead. Runs are sized |
* such that this setting is still honored, without violating other constraints. |
* as small as possible such that this setting is still honored, without |
* The goal is to make runs as small as possible without exceeding a per run |
* violating other constraints. The goal is to make runs as small as possible |
* external fragmentation threshold. |
* without exceeding a per run external fragmentation threshold. |
|
* |
|
* We use binary fixed point math for overhead computations, where the binary |
|
* point is implicitly RUN_BFP bits to the left. |
* |
* |
* Note that it is possible to set this low enough that it cannot be honored |
* Note that it is possible to set RUN_MAX_OVRHD low enough that it cannot be |
* for some/all object sizes, since there is one bit of header overhead per |
* honored for some/all object sizes, since there is one bit of header overhead |
* object (plus a constant). In such cases, this constraint is relaxed. |
* per object (plus a constant). This constraint is relaxed (ignored) for runs |
|
* that are so small that the per-region overhead is greater than: |
* |
* |
* RUN_MAX_OVRHD_RELAX specifies the maximum number of bits per region of |
* (RUN_MAX_OVRHD / (reg_size << (3+RUN_BFP)) |
* overhead for which RUN_MAX_OVRHD is relaxed. |
|
*/ |
*/ |
#define RUN_MAX_OVRHD 0.015 |
#define RUN_BFP 12 |
#define RUN_MAX_OVRHD_RELAX 1.5 |
/* \/ Implicit binary fixed point. */ |
|
#define RUN_MAX_OVRHD 0x0000003dU |
|
#define RUN_MAX_OVRHD_RELAX 0x00001800U |
|
|
/* Put a cap on small object run size. This overrides RUN_MAX_OVRHD. */ |
/* Put a cap on small object run size. This overrides RUN_MAX_OVRHD. */ |
#define RUN_MAX_SMALL_2POW 15 |
#define RUN_MAX_SMALL_2POW 15 |
Line 811 static void wrtmessage(const char *p1, c |
|
Line 811 static void wrtmessage(const char *p1, c |
|
#ifdef MALLOC_STATS |
#ifdef MALLOC_STATS |
static void malloc_printf(const char *format, ...); |
static void malloc_printf(const char *format, ...); |
#endif |
#endif |
static char *umax2s(uintmax_t x, char *s); |
static char *size_t2s(size_t x, char *s); |
static bool base_pages_alloc(size_t minsize); |
static bool base_pages_alloc(size_t minsize); |
static void *base_alloc(size_t size); |
static void *base_alloc(size_t size); |
static chunk_node_t *base_chunk_node_alloc(void); |
static chunk_node_t *base_chunk_node_alloc(void); |
Line 973 malloc_printf(const char *format, ...) |
|
Line 973 malloc_printf(const char *format, ...) |
|
|
|
/* |
/* |
* We don't want to depend on vsnprintf() for production builds, since that can |
* We don't want to depend on vsnprintf() for production builds, since that can |
* cause unnecessary bloat for static binaries. umax2s() provides minimal |
* cause unnecessary bloat for static binaries. size_t2s() provides minimal |
* integer printing functionality, so that malloc_printf() use can be limited to |
* integer printing functionality, so that malloc_printf() use can be limited to |
* MALLOC_STATS code. |
* MALLOC_STATS code. |
*/ |
*/ |
#define UMAX2S_BUFSIZE 21 |
#define UMAX2S_BUFSIZE 21 |
static char * |
static char * |
umax2s(uintmax_t x, char *s) |
size_t2s(size_t x, char *s) |
{ |
{ |
unsigned i; |
unsigned i; |
|
|
/* Make sure UMAX2S_BUFSIZE is large enough. */ |
/* Make sure UMAX2S_BUFSIZE is large enough. */ |
/* LINTED */ |
/* LINTED */ |
assert(sizeof(uintmax_t) <= 8); |
assert(sizeof(size_t) <= 8); |
|
|
i = UMAX2S_BUFSIZE - 1; |
i = UMAX2S_BUFSIZE - 1; |
s[i] = '\0'; |
s[i] = '\0'; |
Line 1029 base_pages_alloc(size_t minsize) |
|
Line 1029 base_pages_alloc(size_t minsize) |
|
*/ |
*/ |
incr = (intptr_t)chunksize |
incr = (intptr_t)chunksize |
- (intptr_t)CHUNK_ADDR2OFFSET(brk_cur); |
- (intptr_t)CHUNK_ADDR2OFFSET(brk_cur); |
if (incr < minsize) |
assert(incr >= 0); |
|
if ((size_t)incr < minsize) |
incr += csize; |
incr += csize; |
|
|
brk_prev = sbrk(incr); |
brk_prev = sbrk(incr); |
Line 1364 chunk_alloc(size_t size) |
|
Line 1365 chunk_alloc(size_t size) |
|
*/ |
*/ |
incr = (intptr_t)size |
incr = (intptr_t)size |
- (intptr_t)CHUNK_ADDR2OFFSET(brk_cur); |
- (intptr_t)CHUNK_ADDR2OFFSET(brk_cur); |
if (incr == size) { |
if (incr == (intptr_t)size) { |
ret = brk_cur; |
ret = brk_cur; |
} else { |
} else { |
ret = (void *)((intptr_t)brk_cur + incr); |
ret = (void *)((intptr_t)brk_cur + incr); |
Line 2142 arena_bin_run_size_calc(arena_bin_t *bin |
|
Line 2143 arena_bin_run_size_calc(arena_bin_t *bin |
|
size_t try_run_size, good_run_size; |
size_t try_run_size, good_run_size; |
unsigned good_nregs, good_mask_nelms, good_reg0_offset; |
unsigned good_nregs, good_mask_nelms, good_reg0_offset; |
unsigned try_nregs, try_mask_nelms, try_reg0_offset; |
unsigned try_nregs, try_mask_nelms, try_reg0_offset; |
float max_ovrhd = RUN_MAX_OVRHD; |
|
|
|
assert(min_run_size >= pagesize); |
assert(min_run_size >= pagesize); |
assert(min_run_size <= arena_maxclass); |
assert(min_run_size <= arena_maxclass); |
Line 2160 arena_bin_run_size_calc(arena_bin_t *bin |
|
Line 2160 arena_bin_run_size_calc(arena_bin_t *bin |
|
*/ |
*/ |
try_run_size = min_run_size; |
try_run_size = min_run_size; |
try_nregs = (unsigned)(((try_run_size - sizeof(arena_run_t)) / |
try_nregs = (unsigned)(((try_run_size - sizeof(arena_run_t)) / |
bin->reg_size) + 1); /* Counter-act the first line of the loop. */ |
bin->reg_size) + 1); /* Counter-act try_nregs-- in loop. */ |
do { |
do { |
try_nregs--; |
try_nregs--; |
try_mask_nelms = (try_nregs >> (SIZEOF_INT_2POW + 3)) + |
try_mask_nelms = (try_nregs >> (SIZEOF_INT_2POW + 3)) + |
Line 2194 arena_bin_run_size_calc(arena_bin_t *bin |
|
Line 2194 arena_bin_run_size_calc(arena_bin_t *bin |
|
} while (sizeof(arena_run_t) + (sizeof(unsigned) * |
} while (sizeof(arena_run_t) + (sizeof(unsigned) * |
(try_mask_nelms - 1)) > try_reg0_offset); |
(try_mask_nelms - 1)) > try_reg0_offset); |
} while (try_run_size <= arena_maxclass && try_run_size <= RUN_MAX_SMALL |
} while (try_run_size <= arena_maxclass && try_run_size <= RUN_MAX_SMALL |
&& max_ovrhd > RUN_MAX_OVRHD_RELAX / ((float)(bin->reg_size << 3)) |
&& RUN_MAX_OVRHD * (bin->reg_size << 3) > RUN_MAX_OVRHD_RELAX |
&& ((float)(try_reg0_offset)) / ((float)(try_run_size)) > |
&& (try_reg0_offset << RUN_BFP) > RUN_MAX_OVRHD * try_run_size); |
max_ovrhd); |
|
|
|
assert(sizeof(arena_run_t) + (sizeof(unsigned) * (good_mask_nelms - 1)) |
assert(sizeof(arena_run_t) + (sizeof(unsigned) * (good_mask_nelms - 1)) |
<= good_reg0_offset); |
<= good_reg0_offset); |
Line 2855 huge_ralloc(void *ptr, size_t size, size |
|
Line 2854 huge_ralloc(void *ptr, size_t size, size |
|
/* size_t wrap-around */ |
/* size_t wrap-around */ |
return (NULL); |
return (NULL); |
} |
} |
|
|
|
/* |
|
* Remove the old region from the tree now. If mremap() |
|
* returns the region to the system, other thread may |
|
* map it for same huge allocation and insert it to the |
|
* tree before we acquire the mutex lock again. |
|
*/ |
|
malloc_mutex_lock(&chunks_mtx); |
|
key.chunk = __DECONST(void *, ptr); |
|
/* LINTED */ |
|
node = RB_FIND(chunk_tree_s, &huge, &key); |
|
assert(node != NULL); |
|
assert(node->chunk == ptr); |
|
assert(node->size == oldcsize); |
|
RB_REMOVE(chunk_tree_s, &huge, node); |
|
malloc_mutex_unlock(&chunks_mtx); |
|
|
newptr = mremap(ptr, oldcsize, NULL, newcsize, |
newptr = mremap(ptr, oldcsize, NULL, newcsize, |
MAP_ALIGNED(chunksize_2pow)); |
MAP_ALIGNED(chunksize_2pow)); |
if (newptr != MAP_FAILED) { |
if (newptr == MAP_FAILED) { |
|
/* We still own the old region. */ |
|
malloc_mutex_lock(&chunks_mtx); |
|
RB_INSERT(chunk_tree_s, &huge, node); |
|
malloc_mutex_unlock(&chunks_mtx); |
|
} else { |
assert(CHUNK_ADDR2BASE(newptr) == newptr); |
assert(CHUNK_ADDR2BASE(newptr) == newptr); |
|
|
/* update tree */ |
/* Insert new or resized old region. */ |
malloc_mutex_lock(&chunks_mtx); |
malloc_mutex_lock(&chunks_mtx); |
key.chunk = __DECONST(void *, ptr); |
|
/* LINTED */ |
|
node = RB_FIND(chunk_tree_s, &huge, &key); |
|
assert(node != NULL); |
|
assert(node->chunk == ptr); |
|
assert(node->size == oldcsize); |
|
node->size = newcsize; |
node->size = newcsize; |
if (ptr != newptr) { |
node->chunk = newptr; |
RB_REMOVE(chunk_tree_s, &huge, node); |
RB_INSERT(chunk_tree_s, &huge, node); |
node->chunk = newptr; |
|
RB_INSERT(chunk_tree_s, &huge, node); |
|
} |
|
#ifdef MALLOC_STATS |
#ifdef MALLOC_STATS |
huge_nralloc++; |
huge_nralloc++; |
huge_allocated += newcsize - oldcsize; |
huge_allocated += newcsize - oldcsize; |
Line 3201 malloc_print_stats(void) |
|
Line 3213 malloc_print_stats(void) |
|
opt_xmalloc ? "X" : "x", |
opt_xmalloc ? "X" : "x", |
opt_zero ? "Z\n" : "z\n"); |
opt_zero ? "Z\n" : "z\n"); |
|
|
_malloc_message("CPUs: ", umax2s(ncpus, s), "\n", ""); |
_malloc_message("CPUs: ", size_t2s(ncpus, s), "\n", ""); |
_malloc_message("Max arenas: ", umax2s(narenas, s), "\n", ""); |
_malloc_message("Max arenas: ", size_t2s(narenas, s), "\n", ""); |
_malloc_message("Pointer size: ", umax2s(sizeof(void *), s), |
_malloc_message("Pointer size: ", size_t2s(sizeof(void *), s), |
"\n", ""); |
"\n", ""); |
_malloc_message("Quantum size: ", umax2s(quantum, s), "\n", ""); |
_malloc_message("Quantum size: ", size_t2s(quantum, s), "\n", ""); |
_malloc_message("Max small size: ", umax2s(small_max, s), "\n", |
_malloc_message("Max small size: ", size_t2s(small_max, s), "\n", |
""); |
""); |
|
|
_malloc_message("Chunk size: ", umax2s(chunksize, s), "", ""); |
_malloc_message("Chunk size: ", size_t2s(chunksize, s), "", ""); |
_malloc_message(" (2^", umax2s(opt_chunk_2pow, s), ")\n", ""); |
_malloc_message(" (2^", size_t2s((size_t)opt_chunk_2pow, s), |
|
")\n", ""); |
|
|
#ifdef MALLOC_STATS |
#ifdef MALLOC_STATS |
{ |
{ |
Line 3308 malloc_init_hard(void) |
|
Line 3321 malloc_init_hard(void) |
|
ssize_t linklen; |
ssize_t linklen; |
char buf[PATH_MAX + 1]; |
char buf[PATH_MAX + 1]; |
const char *opts = ""; |
const char *opts = ""; |
|
int serrno; |
|
|
malloc_mutex_lock(&init_lock); |
malloc_mutex_lock(&init_lock); |
if (malloc_initialized) { |
if (malloc_initialized) { |
Line 3319 malloc_init_hard(void) |
|
Line 3333 malloc_init_hard(void) |
|
return (false); |
return (false); |
} |
} |
|
|
|
serrno = errno; |
/* Get number of CPUs. */ |
/* Get number of CPUs. */ |
{ |
{ |
int mib[2]; |
int mib[2]; |
Line 3430 malloc_init_hard(void) |
|
Line 3445 malloc_init_hard(void) |
|
opt_chunk_2pow--; |
opt_chunk_2pow--; |
break; |
break; |
case 'K': |
case 'K': |
/* |
if (opt_chunk_2pow + 1 < |
* There must be fewer pages in a chunk than |
(int)(sizeof(size_t) << 3)) |
* can be recorded by the pos field of |
|
* arena_chunk_map_t, in order to make POS_FREE |
|
* special. |
|
*/ |
|
if (opt_chunk_2pow - pagesize_2pow |
|
< (sizeof(uint32_t) << 3) - 1) |
|
opt_chunk_2pow++; |
opt_chunk_2pow++; |
break; |
break; |
case 'n': |
case 'n': |
Line 3504 malloc_init_hard(void) |
|
Line 3513 malloc_init_hard(void) |
|
} |
} |
} |
} |
} |
} |
|
errno = serrno; |
|
|
/* Take care to call atexit() only once. */ |
/* Take care to call atexit() only once. */ |
if (opt_print_stats) { |
if (opt_print_stats) { |