server-skynet-source-3rd-je.../include/jemalloc/internal/prof_inlines_b.h

241 lines
6.8 KiB
C

#ifndef JEMALLOC_INTERNAL_PROF_INLINES_B_H
#define JEMALLOC_INTERNAL_PROF_INLINES_B_H
#ifndef JEMALLOC_ENABLE_INLINE
bool prof_active_get_unlocked(void);
bool prof_gdump_get_unlocked(void);
prof_tdata_t *prof_tdata_get(tsd_t *tsd, bool create);
prof_tctx_t *prof_tctx_get(tsdn_t *tsdn, const extent_t *extent,
const void *ptr);
void prof_tctx_set(tsdn_t *tsdn, extent_t *extent, const void *ptr,
size_t usize, prof_tctx_t *tctx);
void prof_tctx_reset(tsdn_t *tsdn, extent_t *extent, const void *ptr,
prof_tctx_t *tctx);
bool prof_sample_accum_update(tsd_t *tsd, size_t usize, bool update,
prof_tdata_t **tdata_out);
prof_tctx_t *prof_alloc_prep(tsd_t *tsd, size_t usize, bool prof_active,
bool update);
void prof_malloc(tsdn_t *tsdn, extent_t *extent, const void *ptr,
size_t usize, prof_tctx_t *tctx);
void prof_realloc(tsd_t *tsd, extent_t *extent, const void *ptr,
size_t usize, prof_tctx_t *tctx, bool prof_active, bool updated,
extent_t *old_extent, const void *old_ptr, size_t old_usize,
prof_tctx_t *old_tctx);
void prof_free(tsd_t *tsd, const extent_t *extent, const void *ptr,
size_t usize);
#endif
#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_PROF_C_))
JEMALLOC_ALWAYS_INLINE bool
prof_active_get_unlocked(void) {
/*
* Even if opt_prof is true, sampling can be temporarily disabled by
* setting prof_active to false. No locking is used when reading
* prof_active in the fast path, so there are no guarantees regarding
* how long it will take for all threads to notice state changes.
*/
return prof_active;
}
JEMALLOC_ALWAYS_INLINE bool
prof_gdump_get_unlocked(void) {
/*
* No locking is used when reading prof_gdump_val in the fast path, so
* there are no guarantees regarding how long it will take for all
* threads to notice state changes.
*/
return prof_gdump_val;
}
JEMALLOC_ALWAYS_INLINE prof_tdata_t *
prof_tdata_get(tsd_t *tsd, bool create) {
prof_tdata_t *tdata;
cassert(config_prof);
tdata = tsd_prof_tdata_get(tsd);
if (create) {
if (unlikely(tdata == NULL)) {
if (tsd_nominal(tsd)) {
tdata = prof_tdata_init(tsd);
tsd_prof_tdata_set(tsd, tdata);
}
} else if (unlikely(tdata->expired)) {
tdata = prof_tdata_reinit(tsd, tdata);
tsd_prof_tdata_set(tsd, tdata);
}
assert(tdata == NULL || tdata->attached);
}
return tdata;
}
JEMALLOC_ALWAYS_INLINE prof_tctx_t *
prof_tctx_get(tsdn_t *tsdn, const extent_t *extent, const void *ptr) {
cassert(config_prof);
assert(ptr != NULL);
return arena_prof_tctx_get(tsdn, extent, ptr);
}
JEMALLOC_ALWAYS_INLINE void
prof_tctx_set(tsdn_t *tsdn, extent_t *extent, const void *ptr, size_t usize,
prof_tctx_t *tctx) {
cassert(config_prof);
assert(ptr != NULL);
arena_prof_tctx_set(tsdn, extent, ptr, usize, tctx);
}
JEMALLOC_ALWAYS_INLINE void
prof_tctx_reset(tsdn_t *tsdn, extent_t *extent, const void *ptr,
prof_tctx_t *tctx) {
cassert(config_prof);
assert(ptr != NULL);
arena_prof_tctx_reset(tsdn, extent, ptr, tctx);
}
JEMALLOC_ALWAYS_INLINE bool
prof_sample_accum_update(tsd_t *tsd, size_t usize, bool update,
prof_tdata_t **tdata_out) {
prof_tdata_t *tdata;
cassert(config_prof);
tdata = prof_tdata_get(tsd, true);
if (unlikely((uintptr_t)tdata <= (uintptr_t)PROF_TDATA_STATE_MAX)) {
tdata = NULL;
}
if (tdata_out != NULL) {
*tdata_out = tdata;
}
if (unlikely(tdata == NULL)) {
return true;
}
if (likely(tdata->bytes_until_sample >= usize)) {
if (update) {
tdata->bytes_until_sample -= usize;
}
return true;
} else {
/* Compute new sample threshold. */
if (update) {
prof_sample_threshold_update(tdata);
}
return !tdata->active;
}
}
JEMALLOC_ALWAYS_INLINE prof_tctx_t *
prof_alloc_prep(tsd_t *tsd, size_t usize, bool prof_active, bool update) {
prof_tctx_t *ret;
prof_tdata_t *tdata;
prof_bt_t bt;
assert(usize == s2u(usize));
if (!prof_active || likely(prof_sample_accum_update(tsd, usize, update,
&tdata))) {
ret = (prof_tctx_t *)(uintptr_t)1U;
} else {
bt_init(&bt, tdata->vec);
prof_backtrace(&bt);
ret = prof_lookup(tsd, &bt);
}
return ret;
}
JEMALLOC_ALWAYS_INLINE void
prof_malloc(tsdn_t *tsdn, extent_t *extent, const void *ptr, size_t usize,
prof_tctx_t *tctx) {
cassert(config_prof);
assert(ptr != NULL);
assert(usize == isalloc(tsdn, ptr));
if (unlikely((uintptr_t)tctx > (uintptr_t)1U)) {
prof_malloc_sample_object(tsdn, extent, ptr, usize, tctx);
} else {
prof_tctx_set(tsdn, extent, ptr, usize,
(prof_tctx_t *)(uintptr_t)1U);
}
}
JEMALLOC_ALWAYS_INLINE void
prof_realloc(tsd_t *tsd, extent_t *extent, const void *ptr, size_t usize,
prof_tctx_t *tctx, bool prof_active, bool updated, extent_t *old_extent,
const void *old_ptr, size_t old_usize, prof_tctx_t *old_tctx) {
bool sampled, old_sampled, moved;
cassert(config_prof);
assert(ptr != NULL || (uintptr_t)tctx <= (uintptr_t)1U);
if (prof_active && !updated && ptr != NULL) {
assert(usize == isalloc(tsd_tsdn(tsd), ptr));
if (prof_sample_accum_update(tsd, usize, true, NULL)) {
/*
* Don't sample. The usize passed to prof_alloc_prep()
* was larger than what actually got allocated, so a
* backtrace was captured for this allocation, even
* though its actual usize was insufficient to cross the
* sample threshold.
*/
prof_alloc_rollback(tsd, tctx, true);
tctx = (prof_tctx_t *)(uintptr_t)1U;
}
}
sampled = ((uintptr_t)tctx > (uintptr_t)1U);
old_sampled = ((uintptr_t)old_tctx > (uintptr_t)1U);
moved = (ptr != old_ptr);
if (unlikely(sampled)) {
prof_malloc_sample_object(tsd_tsdn(tsd), extent, ptr, usize,
tctx);
} else if (moved) {
prof_tctx_set(tsd_tsdn(tsd), extent, ptr, usize,
(prof_tctx_t *)(uintptr_t)1U);
} else if (unlikely(old_sampled)) {
/*
* prof_tctx_set() would work for the !moved case as well, but
* prof_tctx_reset() is slightly cheaper, and the proper thing
* to do here in the presence of explicit knowledge re: moved
* state.
*/
prof_tctx_reset(tsd_tsdn(tsd), extent, ptr, tctx);
} else {
assert((uintptr_t)prof_tctx_get(tsd_tsdn(tsd), extent, ptr) ==
(uintptr_t)1U);
}
/*
* The prof_free_sampled_object() call must come after the
* prof_malloc_sample_object() call, because tctx and old_tctx may be
* the same, in which case reversing the call order could cause the tctx
* to be prematurely destroyed as a side effect of momentarily zeroed
* counters.
*/
if (unlikely(old_sampled)) {
prof_free_sampled_object(tsd, old_usize, old_tctx);
}
}
JEMALLOC_ALWAYS_INLINE void
prof_free(tsd_t *tsd, const extent_t *extent, const void *ptr, size_t usize) {
prof_tctx_t *tctx = prof_tctx_get(tsd_tsdn(tsd), extent, ptr);
cassert(config_prof);
assert(usize == isalloc(tsd_tsdn(tsd), ptr));
if (unlikely((uintptr_t)tctx > (uintptr_t)1U)) {
prof_free_sampled_object(tsd, usize, tctx);
}
}
#endif
#endif /* JEMALLOC_INTERNAL_PROF_INLINES_B_H */