Beispiel #1
0
void
quarantine_cleanup(void *arg)
{
	quarantine_t *quarantine = *(quarantine_t **)arg;

	if (quarantine == QUARANTINE_STATE_REINCARNATED) {
		/*
		 * Another destructor deallocated memory after this destructor
		 * was called.  Reset quarantine to QUARANTINE_STATE_PURGATORY
		 * in order to receive another callback.
		 */
		quarantine = QUARANTINE_STATE_PURGATORY;
		quarantine_tsd_set(&quarantine);
	} else if (quarantine == QUARANTINE_STATE_PURGATORY) {
		/*
		 * The previous time this destructor was called, we set the key
		 * to QUARANTINE_STATE_PURGATORY so that other destructors
		 * wouldn't cause re-creation of the quarantine.  This time, do
		 * nothing, so that the destructor will not be called again.
		 */
	} else if (quarantine != NULL) {
		quarantine_drain(quarantine, 0);
		idalloc(quarantine);
		quarantine = QUARANTINE_STATE_PURGATORY;
		quarantine_tsd_set(&quarantine);
	}
}
Beispiel #2
0
void
quarantine(tsd_t *tsd, void *ptr)
{
	quarantine_t *quarantine;
	size_t usize = isalloc(ptr, config_prof);

	cassert(config_fill);
	assert(opt_quarantine);

	if ((quarantine = tsd_quarantine_get(tsd)) == NULL) {
		idalloctm(tsd, ptr, NULL, false);
		return;
	}
	/*
	 * Drain one or more objects if the quarantine size limit would be
	 * exceeded by appending ptr.
	 */
	if (quarantine->curbytes + usize > opt_quarantine) {
		size_t upper_bound = (opt_quarantine >= usize) ? opt_quarantine
		    - usize : 0;
		quarantine_drain(tsd, quarantine, upper_bound);
	}
	/* Grow the quarantine ring buffer if it's full. */
	if (quarantine->curobjs == (ZU(1) << quarantine->lg_maxobjs))
		quarantine = quarantine_grow(tsd, quarantine);
	/* quarantine_grow() must free a slot if it fails to grow. */
	assert(quarantine->curobjs < (ZU(1) << quarantine->lg_maxobjs));
	/* Append ptr if its size doesn't exceed the quarantine size. */
	if (quarantine->curbytes + usize <= opt_quarantine) {
		size_t offset = (quarantine->first + quarantine->curobjs) &
		    ((ZU(1) << quarantine->lg_maxobjs) - 1);
		quarantine_obj_t *obj = &quarantine->objs[offset];
		obj->ptr = ptr;
		obj->usize = usize;
		quarantine->curbytes += usize;
		quarantine->curobjs++;
		if (config_fill && unlikely(opt_junk_free)) {
			/*
			 * Only do redzone validation if Valgrind isn't in
			 * operation.
			 */
			if ((!config_valgrind || likely(!in_valgrind))
			    && usize <= SMALL_MAXCLASS)
				arena_quarantine_junk_small(ptr, usize);
			else
				memset(ptr, 0x5a, usize);
		}
	} else {
		assert(quarantine->curbytes == 0);
		idalloctm(tsd, ptr, NULL, false);
	}
}
Beispiel #3
0
void
quarantine_cleanup(tsd_t *tsd)
{
	quarantine_t *quarantine;

	if (!config_fill)
		return;

	quarantine = tsd_quarantine_get(tsd);
	if (quarantine != NULL) {
		quarantine_drain(tsd, quarantine, 0);
		idalloctm(tsd, quarantine, tcache_get(tsd, false), true);
		tsd_quarantine_set(tsd, NULL);
	}
}
Beispiel #4
0
void
quarantine(void *ptr)
{
	quarantine_t *quarantine;
	size_t usize = isalloc(ptr, config_prof);

	cassert(config_fill);
	assert(opt_quarantine);

	quarantine = *quarantine_tsd_get();
	if ((uintptr_t)quarantine <= (uintptr_t)QUARANTINE_STATE_MAX) {
		if (quarantine == QUARANTINE_STATE_PURGATORY) {
			/*
			 * Make a note that quarantine() was called after
			 * quarantine_cleanup() was called.
			 */
			quarantine = QUARANTINE_STATE_REINCARNATED;
			quarantine_tsd_set(&quarantine);
		}
		idalloc(ptr);
		return;
	}
	/*
	 * Drain one or more objects if the quarantine size limit would be
	 * exceeded by appending ptr.
	 */
	if (quarantine->curbytes + usize > opt_quarantine) {
		size_t upper_bound = (opt_quarantine >= usize) ? opt_quarantine
		    - usize : 0;
		quarantine_drain(quarantine, upper_bound);
	}
	/* Grow the quarantine ring buffer if it's full. */
	if (quarantine->curobjs == (ZU(1) << quarantine->lg_maxobjs))
		quarantine = quarantine_grow(quarantine);
	/* quarantine_grow() must free a slot if it fails to grow. */
	assert(quarantine->curobjs < (ZU(1) << quarantine->lg_maxobjs));
	/* Append ptr if its size doesn't exceed the quarantine size. */
	if (quarantine->curbytes + usize <= opt_quarantine) {
		size_t offset = (quarantine->first + quarantine->curobjs) &
		    ((ZU(1) << quarantine->lg_maxobjs) - 1);
		quarantine_obj_t *obj = &quarantine->objs[offset];
		obj->ptr = ptr;
		obj->usize = usize;
		quarantine->curbytes += usize;
		quarantine->curobjs++;
		if (config_fill && opt_junk) {
			/*
			 * Only do redzone validation if Valgrind isn't in
			 * operation.
			 */
			if ((config_valgrind == false || in_valgrind == false)
			    && usize <= SMALL_MAXCLASS)
				arena_quarantine_junk_small(ptr, usize);
			else
				memset(ptr, 0x5a, usize);
		}
	} else {
		assert(quarantine->curbytes == 0);
		idalloc(ptr);
	}
}