project-base/server-skynet-source-3rd-jemalloc
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Merge branch 'dev'

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This commit is contained in:
Jason Evans 2011-08-31 16:18:38 -07:00
commit 5bdbae57ee
8 changed files with 176 additions and 141 deletions
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14
ChangeLog
View File

@ -6,6 +6,20 @@ found in the git revision history:
http://www.canonware.com/cgi-bin/gitweb.cgi?p=jemalloc.git
git://canonware.com/jemalloc.git
* 2.2.3 (August 31, 2011)
This version fixes numerous bugs related to heap profiling.
Bug fixes:
- Fix a prof-related race condition. This bug could cause memory corruption,
but only occurred in non-default configurations (prof_accum:false).
- Fix off-by-one backtracing issues (make sure that prof_alloc_prep() is
excluded from backtraces).
- Fix a prof-related bug in realloc() (only triggered by OOM errors).
- Fix prof-related bugs in allocm() and rallocm().
- Fix prof_tdata_cleanup() for --disable-tls builds.
- Fix a relative include path, to fix objdir builds.
* 2.2.2 (July 30, 2011)
Bug fixes:

2
doc/jemalloc.xml.in
View File

@ -2025,7 +2025,7 @@ malloc_conf = "xmalloc:true";]]></programlisting>
<term>
<mallctl>swap.fds</mallctl>
(<type>int *</type>)
<literal>r-</literal>
<literal>rw</literal>
[<option>--enable-swap</option>]
</term>
<listitem><para>When written to, the files associated with the

2
include/jemalloc/internal/jemalloc_internal.h.in
View File

@ -33,7 +33,7 @@
#define JEMALLOC_MANGLE
#include "../jemalloc@install_suffix@.h"
#include "private_namespace.h"
#include "jemalloc/internal/private_namespace.h"
#if (defined(JEMALLOC_OSATOMIC) || defined(JEMALLOC_OSSPIN))
#include <libkern/OSAtomic.h>

1
include/jemalloc/internal/private_namespace.h
View File

@ -145,7 +145,6 @@
#define malloc_write JEMALLOC_N(malloc_write)
#define mb_write JEMALLOC_N(mb_write)
#define pow2_ceil JEMALLOC_N(pow2_ceil)
#define prof_alloc_prep JEMALLOC_N(prof_alloc_prep)
#define prof_backtrace JEMALLOC_N(prof_backtrace)
#define prof_boot0 JEMALLOC_N(prof_boot0)
#define prof_boot1 JEMALLOC_N(prof_boot1)

122
include/jemalloc/internal/prof.h
View File

@ -227,9 +227,60 @@ bool prof_boot2(void);
/******************************************************************************/
#ifdef JEMALLOC_H_INLINES
#define PROF_ALLOC_PREP(nignore, size, ret) do { \
prof_tdata_t *prof_tdata; \
prof_bt_t bt; \
\
assert(size == s2u(size)); \
\
prof_tdata = PROF_TCACHE_GET(); \
if (prof_tdata == NULL) { \
prof_tdata = prof_tdata_init(); \
if (prof_tdata == NULL) { \
ret = NULL; \
break; \
} \
} \
\
if (opt_prof_active == false) { \
/* Sampling is currently inactive, so avoid sampling. */\
ret = (prof_thr_cnt_t *)(uintptr_t)1U; \
} else if (opt_lg_prof_sample == 0) { \
/* Don't bother with sampling logic, since sampling */\
/* interval is 1. */\
bt_init(&bt, prof_tdata->vec); \
prof_backtrace(&bt, nignore, prof_bt_max); \
ret = prof_lookup(&bt); \
} else { \
if (prof_tdata->threshold == 0) { \
/* Initialize. Seed the prng differently for */\
/* each thread. */\
prof_tdata->prn_state = \
(uint64_t)(uintptr_t)&size; \
prof_sample_threshold_update(prof_tdata); \
} \
\
/* Determine whether to capture a backtrace based on */\
/* whether size is enough for prof_accum to reach */\
/* prof_tdata->threshold. However, delay updating */\
/* these variables until prof_{m,re}alloc(), because */\
/* we don't know for sure that the allocation will */\
/* succeed. */\
/* */\
/* Use subtraction rather than addition to avoid */\
/* potential integer overflow. */\
if (size >= prof_tdata->threshold - \
prof_tdata->accum) { \
bt_init(&bt, prof_tdata->vec); \
prof_backtrace(&bt, nignore, prof_bt_max); \
ret = prof_lookup(&bt); \
} else \
ret = (prof_thr_cnt_t *)(uintptr_t)1U; \
} \
} while (0)
#ifndef JEMALLOC_ENABLE_INLINE
void prof_sample_threshold_update(prof_tdata_t *prof_tdata);
prof_thr_cnt_t *prof_alloc_prep(size_t size);
prof_ctx_t *prof_ctx_get(const void *ptr);
void prof_ctx_set(const void *ptr, prof_ctx_t *ctx);
bool prof_sample_accum_update(size_t size);
@ -272,71 +323,6 @@ prof_sample_threshold_update(prof_tdata_t *prof_tdata)
+ (uint64_t)1U;
}
JEMALLOC_INLINE prof_thr_cnt_t *
prof_alloc_prep(size_t size)
{
#ifdef JEMALLOC_ENABLE_INLINE
/* This function does not have its own stack frame, because it is inlined. */
# define NIGNORE 1
#else
# define NIGNORE 2
#endif
prof_thr_cnt_t *ret;
prof_tdata_t *prof_tdata;
prof_bt_t bt;
assert(size == s2u(size));
prof_tdata = PROF_TCACHE_GET();
if (prof_tdata == NULL) {
prof_tdata = prof_tdata_init();
if (prof_tdata == NULL)
return (NULL);
}
if (opt_prof_active == false) {
/* Sampling is currently inactive, so avoid sampling. */
ret = (prof_thr_cnt_t *)(uintptr_t)1U;
} else if (opt_lg_prof_sample == 0) {
/*
* Don't bother with sampling logic, since sampling interval is
* 1.
*/
bt_init(&bt, prof_tdata->vec);
prof_backtrace(&bt, NIGNORE, prof_bt_max);
ret = prof_lookup(&bt);
} else {
if (prof_tdata->threshold == 0) {
/*
* Initialize. Seed the prng differently for each
* thread.
*/
prof_tdata->prn_state = (uint64_t)(uintptr_t)&size;
prof_sample_threshold_update(prof_tdata);
}
/*
* Determine whether to capture a backtrace based on whether
* size is enough for prof_accum to reach
* prof_tdata->threshold. However, delay updating these
* variables until prof_{m,re}alloc(), because we don't know
* for sure that the allocation will succeed.
*
* Use subtraction rather than addition to avoid potential
* integer overflow.
*/
if (size >= prof_tdata->threshold - prof_tdata->accum) {
bt_init(&bt, prof_tdata->vec);
prof_backtrace(&bt, NIGNORE, prof_bt_max);
ret = prof_lookup(&bt);
} else
ret = (prof_thr_cnt_t *)(uintptr_t)1U;
}
return (ret);
#undef NIGNORE
}
JEMALLOC_INLINE prof_ctx_t *
prof_ctx_get(const void *ptr)
{
@ -415,7 +401,7 @@ prof_malloc(const void *ptr, size_t size, prof_thr_cnt_t *cnt)
* always possible to tell in advance how large an
* object's usable size will be, so there should never
* be a difference between the size passed to
* prof_alloc_prep() and prof_malloc().
* PROF_ALLOC_PREP() and prof_malloc().
*/
assert((uintptr_t)cnt == (uintptr_t)1U);
}
@ -459,7 +445,7 @@ prof_realloc(const void *ptr, size_t size, prof_thr_cnt_t *cnt,
if (prof_sample_accum_update(size)) {
/*
* Don't sample. The size passed to
* prof_alloc_prep() was larger than what
* PROF_ALLOC_PREP() was larger than what
* actually got allocated, so a backtrace was
* captured for this allocation, even though
* its actual size was insufficient to cross

1
src/arena.c
View File

@ -1657,6 +1657,7 @@ arena_prof_promoted(const void *ptr, size_t size)
assert(ptr != NULL);
assert(CHUNK_ADDR2BASE(ptr) != ptr);
assert(isalloc(ptr) == PAGE_SIZE);
assert(size <= small_maxclass);
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> PAGE_SHIFT;

78
src/jemalloc.c
View File

@ -84,6 +84,7 @@ static void malloc_conf_error(const char *msg, const char *k, size_t klen,
const char *v, size_t vlen);
static void malloc_conf_init(void);
static bool malloc_init_hard(void);
static int imemalign(void **memptr, size_t alignment, size_t size);
/******************************************************************************/
/* malloc_message() setup. */
@ -939,7 +940,8 @@ JEMALLOC_P(malloc)(size_t size)
#ifdef JEMALLOC_PROF
if (opt_prof) {
usize = s2u(size);
if ((cnt = prof_alloc_prep(usize)) == NULL) {
PROF_ALLOC_PREP(1, usize, cnt);
if (cnt == NULL) {
ret = NULL;
goto OOM;
}
@ -988,9 +990,15 @@ RETURN:
}
JEMALLOC_ATTR(nonnull(1))
JEMALLOC_ATTR(visibility("default"))
int
JEMALLOC_P(posix_memalign)(void **memptr, size_t alignment, size_t size)
#ifdef JEMALLOC_PROF
/*
* Avoid any uncertainty as to how many backtrace frames to ignore in
* PROF_ALLOC_PREP().
*/
JEMALLOC_ATTR(noinline)
#endif
static int
imemalign(void **memptr, size_t alignment, size_t size)
{
int ret;
size_t usize
@ -1057,7 +1065,8 @@ JEMALLOC_P(posix_memalign)(void **memptr, size_t alignment, size_t size)
#ifdef JEMALLOC_PROF
if (opt_prof) {
if ((cnt = prof_alloc_prep(usize)) == NULL) {
PROF_ALLOC_PREP(2, usize, cnt);
if (cnt == NULL) {
result = NULL;
ret = EINVAL;
} else {
@ -1110,6 +1119,15 @@ RETURN:
return (ret);
}
JEMALLOC_ATTR(nonnull(1))
JEMALLOC_ATTR(visibility("default"))
int
JEMALLOC_P(posix_memalign)(void **memptr, size_t alignment, size_t size)
{
return imemalign(memptr, alignment, size);
}
JEMALLOC_ATTR(malloc)
JEMALLOC_ATTR(visibility("default"))
void *
@ -1165,7 +1183,8 @@ JEMALLOC_P(calloc)(size_t num, size_t size)
#ifdef JEMALLOC_PROF
if (opt_prof) {
usize = s2u(num_size);
if ((cnt = prof_alloc_prep(usize)) == NULL) {
PROF_ALLOC_PREP(1, usize, cnt);
if (cnt == NULL) {
ret = NULL;
goto RETURN;
}
@ -1278,7 +1297,9 @@ JEMALLOC_P(realloc)(void *ptr, size_t size)
if (opt_prof) {
usize = s2u(size);
old_ctx = prof_ctx_get(ptr);
if ((cnt = prof_alloc_prep(usize)) == NULL) {
PROF_ALLOC_PREP(1, usize, cnt);
if (cnt == NULL) {
old_ctx = NULL;
ret = NULL;
goto OOM;
}
@ -1288,8 +1309,13 @@ JEMALLOC_P(realloc)(void *ptr, size_t size)
false, false);
if (ret != NULL)
arena_prof_promoted(ret, usize);
} else
else
old_ctx = NULL;
} else {
ret = iralloc(ptr, size, 0, 0, false, false);
if (ret == NULL)
old_ctx = NULL;
}
} else
#endif
{
@ -1327,7 +1353,8 @@ OOM:
#ifdef JEMALLOC_PROF
if (opt_prof) {
usize = s2u(size);
if ((cnt = prof_alloc_prep(usize)) == NULL)
PROF_ALLOC_PREP(1, usize, cnt);
if (cnt == NULL)
ret = NULL;
else {
if (prof_promote && (uintptr_t)cnt !=
@ -1432,7 +1459,7 @@ JEMALLOC_P(memalign)(size_t alignment, size_t size)
#ifdef JEMALLOC_CC_SILENCE
int result =
#endif
JEMALLOC_P(posix_memalign)(&ret, alignment, size);
imemalign(&ret, alignment, size);
#ifdef JEMALLOC_CC_SILENCE
if (result != 0)
return (NULL);
@ -1451,7 +1478,7 @@ JEMALLOC_P(valloc)(size_t size)
#ifdef JEMALLOC_CC_SILENCE
int result =
#endif
JEMALLOC_P(posix_memalign)(&ret, PAGE_SIZE, size);
imemalign(&ret, PAGE_SIZE, size);
#ifdef JEMALLOC_CC_SILENCE
if (result != 0)
return (NULL);
@ -1566,14 +1593,14 @@ JEMALLOC_P(allocm)(void **ptr, size_t *rsize, size_t size, int flags)
if (malloc_init())
goto OOM;
usize = (alignment == 0) ? s2u(size) : sa2u(size, alignment,
NULL);
usize = (alignment == 0) ? s2u(size) : sa2u(size, alignment, NULL);
if (usize == 0)
goto OOM;
#ifdef JEMALLOC_PROF
if (opt_prof) {
if ((cnt = prof_alloc_prep(usize)) == NULL)
PROF_ALLOC_PREP(1, usize, cnt);
if (cnt == NULL)
goto OOM;
if (prof_promote && (uintptr_t)cnt != (uintptr_t)1U && usize <=
small_maxclass) {
@ -1590,7 +1617,7 @@ JEMALLOC_P(allocm)(void **ptr, size_t *rsize, size_t size, int flags)
if (p == NULL)
goto OOM;
}
prof_malloc(p, usize, cnt);
if (rsize != NULL)
*rsize = usize;
} else
@ -1645,7 +1672,6 @@ JEMALLOC_P(rallocm)(void **ptr, size_t *rsize, size_t size, size_t extra,
bool no_move = flags & ALLOCM_NO_MOVE;
#ifdef JEMALLOC_PROF
prof_thr_cnt_t *cnt;
prof_ctx_t *old_ctx;
#endif
assert(ptr != NULL);
@ -1660,25 +1686,33 @@ JEMALLOC_P(rallocm)(void **ptr, size_t *rsize, size_t size, size_t extra,
/*
* usize isn't knowable before iralloc() returns when extra is
* non-zero. Therefore, compute its maximum possible value and
* use that in prof_alloc_prep() to decide whether to capture a
* use that in PROF_ALLOC_PREP() to decide whether to capture a
* backtrace. prof_realloc() will use the actual usize to
* decide whether to sample.
*/
size_t max_usize = (alignment == 0) ? s2u(size+extra) :
sa2u(size+extra, alignment, NULL);
prof_ctx_t *old_ctx = prof_ctx_get(p);
old_size = isalloc(p);
old_ctx = prof_ctx_get(p);
if ((cnt = prof_alloc_prep(max_usize)) == NULL)
PROF_ALLOC_PREP(1, max_usize, cnt);
if (cnt == NULL)
goto OOM;
if (prof_promote && (uintptr_t)cnt != (uintptr_t)1U && max_usize
<= small_maxclass) {
/*
* Use minimum usize to determine whether promotion may happen.
*/
if (prof_promote && (uintptr_t)cnt != (uintptr_t)1U
&& ((alignment == 0) ? s2u(size) : sa2u(size,
alignment, NULL)) <= small_maxclass) {
q = iralloc(p, small_maxclass+1, (small_maxclass+1 >=
size+extra) ? 0 : size+extra - (small_maxclass+1),
alignment, zero, no_move);
if (q == NULL)
goto ERR;
usize = isalloc(q);
if (max_usize < PAGE_SIZE) {
usize = max_usize;
arena_prof_promoted(q, usize);
} else
usize = isalloc(q);
} else {
q = iralloc(p, size, extra, alignment, zero, no_move);
if (q == NULL)

69
src/prof.c
View File

@ -474,11 +474,23 @@ prof_lookup(prof_bt_t *bt)
/*
* Artificially raise curobjs, in order to avoid a race
* condition with prof_ctx_merge()/prof_ctx_destroy().
*
* No locking is necessary for ctx here because no other
* threads have had the opportunity to fetch it from
* bt2ctx yet.
*/
ctx.p->cnt_merged.curobjs++;
new_ctx = true;
} else
} else {
/*
* Artificially raise curobjs, in order to avoid a race
* condition with prof_ctx_merge()/prof_ctx_destroy().
*/
malloc_mutex_lock(&ctx.p->lock);
ctx.p->cnt_merged.curobjs++;
malloc_mutex_unlock(&ctx.p->lock);
new_ctx = false;
}
prof_leave();
/* Link a prof_thd_cnt_t into ctx for this thread. */
@ -491,8 +503,9 @@ prof_lookup(prof_bt_t *bt)
*/
ret.p = ql_last(&prof_tdata->lru_ql, lru_link);
assert(ret.v != NULL);
ckh_remove(&prof_tdata->bt2cnt, ret.p->ctx->bt, NULL,
NULL);
if (ckh_remove(&prof_tdata->bt2cnt, ret.p->ctx->bt,
NULL, NULL))
assert(false);
ql_remove(&prof_tdata->lru_ql, ret.p, lru_link);
prof_ctx_merge(ret.p->ctx, ret.p);
/* ret can now be re-used. */
@ -503,11 +516,8 @@ prof_lookup(prof_bt_t *bt)
/* Allocate and partially initialize a new cnt. */
ret.v = imalloc(sizeof(prof_thr_cnt_t));
if (ret.p == NULL) {
if (new_ctx) {
malloc_mutex_lock(&ctx.p->lock);
ctx.p->cnt_merged.curobjs--;
malloc_mutex_unlock(&ctx.p->lock);
}
if (new_ctx)
prof_ctx_destroy(ctx.p);
return (NULL);
}
ql_elm_new(ret.p, cnts_link);
@ -518,18 +528,14 @@ prof_lookup(prof_bt_t *bt)
ret.p->epoch = 0;
memset(&ret.p->cnts, 0, sizeof(prof_cnt_t));
if (ckh_insert(&prof_tdata->bt2cnt, btkey.v, ret.v)) {
if (new_ctx) {
malloc_mutex_lock(&ctx.p->lock);
ctx.p->cnt_merged.curobjs--;
malloc_mutex_unlock(&ctx.p->lock);
}
if (new_ctx)
prof_ctx_destroy(ctx.p);
idalloc(ret.v);
return (NULL);
}
ql_head_insert(&prof_tdata->lru_ql, ret.p, lru_link);
malloc_mutex_lock(&ctx.p->lock);
ql_tail_insert(&ctx.p->cnts_ql, ret.p, cnts_link);
if (new_ctx)
ctx.p->cnt_merged.curobjs--;
malloc_mutex_unlock(&ctx.p->lock);
} else {
@ -644,11 +650,10 @@ prof_ctx_destroy(prof_ctx_t *ctx)
/*
* Check that ctx is still unused by any thread cache before destroying
* it. prof_lookup() interlocks bt2ctx_mtx and ctx->lock in order to
* avoid a race condition with this function, and prof_ctx_merge()
* artificially raises ctx->cnt_merged.curobjs in order to avoid a race
* between the main body of prof_ctx_merge() and entry into this
* function.
* it. prof_lookup() artificially raises ctx->cnt_merge.curobjs in
* order to avoid a race condition with this function, as does
* prof_ctx_merge() in order to avoid a race between the main body of
* prof_ctx_merge() and entry into this function.
*/
prof_enter();
malloc_mutex_lock(&ctx->lock);
@ -657,7 +662,8 @@ prof_ctx_destroy(prof_ctx_t *ctx)
assert(ctx->cnt_merged.accumobjs == 0);
assert(ctx->cnt_merged.accumbytes == 0);
/* Remove ctx from bt2ctx. */
ckh_remove(&bt2ctx, ctx->bt, NULL, NULL);
if (ckh_remove(&bt2ctx, ctx->bt, NULL, NULL))
assert(false);
prof_leave();
/* Destroy ctx. */
malloc_mutex_unlock(&ctx->lock);
@ -665,7 +671,10 @@ prof_ctx_destroy(prof_ctx_t *ctx)
malloc_mutex_destroy(&ctx->lock);
idalloc(ctx);
} else {
/* Compensate for increment in prof_ctx_merge(). */
/*
* Compensate for increment in prof_ctx_merge() or
* prof_lookup().
*/
ctx->cnt_merged.curobjs--;
malloc_mutex_unlock(&ctx->lock);
prof_leave();
@ -1109,7 +1118,6 @@ prof_tdata_init(void)
prof_tdata->vec = imalloc(sizeof(void *) * prof_bt_max);
if (prof_tdata->vec == NULL) {
ckh_delete(&prof_tdata->bt2cnt);
idalloc(prof_tdata);
return (NULL);
@ -1127,25 +1135,19 @@ prof_tdata_init(void)
static void
prof_tdata_cleanup(void *arg)
{
prof_tdata_t *prof_tdata;
prof_tdata = PROF_TCACHE_GET();
if (prof_tdata != NULL) {
prof_thr_cnt_t *cnt;
prof_tdata_t *prof_tdata = (prof_tdata_t *)arg;
/*
* Delete the hash table. All of its contents can still be
* iterated over via the LRU.
* Delete the hash table. All of its contents can still be iterated
* over via the LRU.
*/
ckh_delete(&prof_tdata->bt2cnt);
/*
* Iteratively merge cnt's into the global stats and delete
* them.
*/
/* Iteratively merge cnt's into the global stats and delete them. */
while ((cnt = ql_last(&prof_tdata->lru_ql, lru_link)) != NULL) {
prof_ctx_merge(cnt->ctx, cnt);
ql_remove(&prof_tdata->lru_ql, cnt, lru_link);
prof_ctx_merge(cnt->ctx, cnt);
idalloc(cnt);
}
@ -1154,7 +1156,6 @@ prof_tdata_cleanup(void *arg)
idalloc(prof_tdata);
PROF_TCACHE_SET(NULL);
}
}
void
prof_boot0(void)