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📄 arena_externs.h(4.83 KB)
📄 arena_inlines_a.h(1.44 KB)
📄 arena_inlines_b.h(11.54 KB)
📄 arena_stats.h(7.92 KB)
📄 arena_structs_a.h(293 B)
📄 arena_structs_b.h(6.63 KB)
📄 arena_types.h(1.67 KB)
📄 assert.h(1.3 KB)
📄 atomic.h(2.66 KB)
📄 atomic_c11.h(3.46 KB)
📄 atomic_gcc_atomic.h(4.06 KB)
📄 atomic_gcc_sync.h(6.21 KB)
📄 background_thread_externs.h(1.29 KB)
📄 background_thread_inlines.h(2.09 KB)
📄 background_thread_structs.h(1.74 KB)
📄 base_externs.h(946 B)
📄 base_inlines.h(312 B)
📄 base_structs.h(1.52 KB)
📄 base_types.h(1.08 KB)
📄 bin.h(3.6 KB)
📄 bin_stats.h(1.35 KB)
📄 bin_types.h(474 B)
📄 bit_util.h(5.22 KB)
📄 bitmap.h(10.97 KB)
📄 cache_bin.h(3.69 KB)
📄 ckh.h(3.19 KB)
📄 ctl.h(3.62 KB)
📄 div.h(1.14 KB)
📄 emitter.h(13.06 KB)
📄 extent_dss.h(728 B)
📄 extent_externs.h(3.75 KB)
📄 extent_inlines.h(13.4 KB)
📄 extent_mmap.h(328 B)
📄 extent_structs.h(8.46 KB)
📄 extent_types.h(700 B)
📄 hash.h(7.88 KB)
📄 hook.h(5.41 KB)
📄 jemalloc_internal_decls.h(2.19 KB)
📄 jemalloc_internal_defs.h(10.93 KB)
📄 jemalloc_internal_defs_FreeBSD.h(256 B)
📄 jemalloc_internal_externs.h(1.75 KB)
📄 jemalloc_internal_includes.h(4.19 KB)
📄 jemalloc_internal_inlines_a.h(4.39 KB)
📄 jemalloc_internal_inlines_b.h(2.24 KB)
📄 jemalloc_internal_inlines_c.h(7.08 KB)
📄 jemalloc_internal_macros.h(3.99 KB)
📄 jemalloc_internal_types.h(3.42 KB)
📄 jemalloc_preamble.h(3.9 KB)
📄 large_externs.h(1.4 KB)
📄 log.h(3.67 KB)
📄 malloc_io.h(2.9 KB)
📄 mutex.h(9.34 KB)
📄 mutex_pool.h(2.81 KB)
📄 mutex_prof.h(3.55 KB)
📄 nstime.h(1.27 KB)
📄 pages.h(3.05 KB)
📄 ph.h(12.26 KB)
📄 private_namespace.h(22.72 KB)
📄 prng.h(4.69 KB)
📄 prof_externs.h(3.79 KB)
📄 prof_inlines_a.h(2.44 KB)
📄 prof_inlines_b.h(6.42 KB)
📄 prof_structs.h(5.02 KB)
📄 prof_types.h(1.74 KB)
📄 public_namespace.h(1.03 KB)
📄 ql.h(2.45 KB)
📄 qr.h(2.29 KB)
📄 quantum.h(1.75 KB)
📄 rb.h(37.41 KB)
📄 rtree.h(17.01 KB)
📄 rtree_tsd.h(1.82 KB)
📄 safety_check.h(797 B)
📄 sc.h(12.98 KB)
📄 seq.h(1.81 KB)
📄 smoothstep.h(15.26 KB)
📄 spin.h(613 B)
📄 stats.h(998 B)
📄 sz.h(7.96 KB)
📄 tcache_externs.h(2.09 KB)
📄 tcache_inlines.h(5.73 KB)
📄 tcache_structs.h(2.05 KB)
📄 tcache_types.h(2.01 KB)
📄 test_hooks.h(459 B)
📄 ticker.h(2.21 KB)
📄 tsd.h(12.49 KB)
📄 tsd_generic.h(3.76 KB)
📄 tsd_malloc_thread_cleanup.h(1.19 KB)
📄 tsd_tls.h(1.12 KB)
📄 tsd_types.h(258 B)
📄 util.h(1.43 KB)
📄 witness.h(9.32 KB)

Editing: prof_inlines_a.h

#ifndef JEMALLOC_INTERNAL_PROF_INLINES_A_H
#define JEMALLOC_INTERNAL_PROF_INLINES_A_H

#include "jemalloc/internal/mutex.h"

static inline bool
prof_accum_add(tsdn_t *tsdn, prof_accum_t *prof_accum,
    uint64_t accumbytes) {
	cassert(config_prof);

bool overflow;
	uint64_t a0, a1;

/*
	 * If the application allocates fast enough (and/or if idump is slow
	 * enough), extreme overflow here (a1 >= prof_interval * 2) can cause
	 * idump trigger coalescing.  This is an intentional mechanism that
	 * avoids rate-limiting allocation.
	 */
#ifdef JEMALLOC_ATOMIC_U64
	a0 = atomic_load_u64(&prof_accum->accumbytes, ATOMIC_RELAXED);
	do {
		a1 = a0 + accumbytes;
		assert(a1 >= a0);
		overflow = (a1 >= prof_interval);
		if (overflow) {
			a1 %= prof_interval;
		}
	} while (!atomic_compare_exchange_weak_u64(&prof_accum->accumbytes, &a0,
	    a1, ATOMIC_RELAXED, ATOMIC_RELAXED));
#else
	malloc_mutex_lock(tsdn, &prof_accum->mtx);
	a0 = prof_accum->accumbytes;
	a1 = a0 + accumbytes;
	overflow = (a1 >= prof_interval);
	if (overflow) {
		a1 %= prof_interval;
	}
	prof_accum->accumbytes = a1;
	malloc_mutex_unlock(tsdn, &prof_accum->mtx);
#endif
	return overflow;
}

static inline void
prof_accum_cancel(tsdn_t *tsdn, prof_accum_t *prof_accum,
    size_t usize) {
	cassert(config_prof);

/*
	 * Cancel out as much of the excessive prof_accumbytes increase as
	 * possible without underflowing.  Interval-triggered dumps occur
	 * slightly more often than intended as a result of incomplete
	 * canceling.
	 */
	uint64_t a0, a1;
#ifdef JEMALLOC_ATOMIC_U64
	a0 = atomic_load_u64(&prof_accum->accumbytes, ATOMIC_RELAXED);
	do {
		a1 = (a0 >= SC_LARGE_MINCLASS - usize)
		    ? a0 - (SC_LARGE_MINCLASS - usize) : 0;
	} while (!atomic_compare_exchange_weak_u64(&prof_accum->accumbytes, &a0,
	    a1, ATOMIC_RELAXED, ATOMIC_RELAXED));
#else
	malloc_mutex_lock(tsdn, &prof_accum->mtx);
	a0 = prof_accum->accumbytes;
	a1 = (a0 >= SC_LARGE_MINCLASS - usize)
	    ?  a0 - (SC_LARGE_MINCLASS - usize) : 0;
	prof_accum->accumbytes = a1;
	malloc_mutex_unlock(tsdn, &prof_accum->mtx);
#endif
}

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;
}

#endif /* JEMALLOC_INTERNAL_PROF_INLINES_A_H */

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