ring_buffer_attach identifier - Linux source code next-20260811

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linux

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FIXME
- FIXME
  - next-20260811

Defined in 1 files as a prototype:

kernel/events/core.c, line 5318 (as a prototype)

Defined in 1 files as a function:

kernel/events/core.c, line 6883 (as a function)

Referenced in 1 files:

kernel/events/core.c

Smatch caller information:

kernel/events/core.c _free_event() -> ring_buffer_attach()

Type	Parameter	Key	Value
PARAM_VALUE	0	event	4096-ptr_max
PARAM_VALUE	0	event->mmap_mutex.dep_map->name	0-255
PARAM_VALUE	0	event->mmap_mutex.first_waiter	0,4096-ptr_max
PARAM_VALUE	0	event->mmap_mutex.first_waiter->list.prev->next	5159360019465732096
PARAM_VALUE	0	event->mmap_mutex.osq.tail.counter	0-s32max
PARAM_VALUE	0	event->mmap_mutex.wait_lock.dep_map->name	0-255
PARAM_VALUE	0	event->mmap_mutex.wait_lock.owner	(-1)
PARAM_VALUE	0	event->mmap_mutex.wait_lock.owner_cpu	u32max
PARAM_VALUE	0	event->pmu	4096-ptr_max
PARAM_VALUE	0	event->pmu->capabilities	s32min-(-1),2048-s32max
PARAM_VALUE	0	event->rb	1-u64max
PARAM_VALUE	1	rb	0
BUF_SIZE	0	event	s32min-(-1),1-s32max
BUF_SIZE	0	event	s32min-(-1),1-s32max
BUF_SIZE	0	event->ctx	(-1),432
BUF_SIZE	0	event->pmu_ctx	(-1),112
CAPPED_DATA	0	event	1
CAPPED_DATA	0	&event->mmap_mutex	1
DATA_SOURCE	0	event	$0
PREEMPT_ADD
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
HOST_DATA	0	event->group_leader->hw->addr_filters_gen	0-u64max
HOST_DATA	0	event->group_leader->hw->freq_count_stamp	0-u64max
HOST_DATA	0	event->group_leader->hw->freq_time_stamp	0-u64max
HOST_DATA	0	event->group_leader->hw->interrupts	0-u64max
HOST_DATA	0	event->group_leader->hw->interrupts_seq	0-u64max
HOST_DATA	0	event->group_leader->hw->sample_period	0-u64max
HOST_DATA	0	event->group_leader->hw->state	s32min-s32max
HOST_DATA	0	event->group_leader->hw.aux_config	0-u64max
HOST_DATA	0	event->group_leader->hw.aux_paused	0-u32max
HOST_DATA	0	event->group_leader->hw.branch_reg.alloc	s32min-s32max
HOST_DATA	0	event->group_leader->hw.branch_reg.config	0-u64max
HOST_DATA	0	event->group_leader->hw.branch_reg.idx	s32min-s32max
HOST_DATA	0	event->group_leader->hw.branch_reg.reg	0-u32max
HOST_DATA	0	event->group_leader->hw.conf	0-u64max
HOST_DATA	0	event->group_leader->hw.conf1	0-u64max
HOST_DATA	0	event->group_leader->hw.config	0-u64max
HOST_DATA	0	event->group_leader->hw.config1	0-u64max
HOST_DATA	0	event->group_leader->hw.config_base	0-u64max
HOST_DATA	0	event->group_leader->hw.dyn_constraint	0-u64max
HOST_DATA	0	event->group_leader->hw.event_base	0-u64max
HOST_DATA	0	event->group_leader->hw.event_base_rdpmc	s32min-s32max
HOST_DATA	0	event->group_leader->hw.extra_reg.alloc	s32min-s32max
HOST_DATA	0	event->group_leader->hw.extra_reg.config	0-u64max
HOST_DATA	0	event->group_leader->hw.extra_reg.idx	s32min-s32max
HOST_DATA	0	event->group_leader->hw.extra_reg.reg	0-u32max
HOST_DATA	0	event->group_leader->hw.flags	s32min-s32max
HOST_DATA	0	event->group_leader->hw.hrtimer._softexpires	s64min-s64max
HOST_DATA	0	event->group_leader->hw.hrtimer.is_hard	0-1
HOST_DATA	0	event->group_leader->hw.hrtimer.is_lazy	0-1
HOST_DATA	0	event->group_leader->hw.hrtimer.is_queued	0-1
HOST_DATA	0	event->group_leader->hw.hrtimer.is_rel	0-1
HOST_DATA	0	event->group_leader->hw.hrtimer.is_soft	0-1
HOST_DATA	0	event->group_leader->hw.hrtimer.node.expires	s64min-s64max
HOST_DATA	0	event->group_leader->hw.hrtimer.node.node.node.__rb_parent_color	0-u64max
HOST_DATA	0	event->group_leader->hw.idx	s32min-s32max
HOST_DATA	0	event->group_leader->hw.info.address	0-u64max
HOST_DATA	0	event->group_leader->hw.info.len	0-255
HOST_DATA	0	event->group_leader->hw.info.mask	0-u64max
HOST_DATA	0	event->group_leader->hw.info.type	0-255
HOST_DATA	0	event->group_leader->hw.iommu_bank	0-255
HOST_DATA	0	event->group_leader->hw.iommu_cntr	0-255
HOST_DATA	0	event->group_leader->hw.last_cpu	s32min-s32max
HOST_DATA	0	event->group_leader->hw.last_period	0-u64max
HOST_DATA	0	event->group_leader->hw.last_tag	0-u64max
HOST_DATA	0	event->group_leader->hw.padding	0-u16max
HOST_DATA	0	event->group_leader->hw.period_left.a.a.counter	s64min-s64max
HOST_DATA	0	event->group_leader->hw.prev_count.a.a.counter	s64min-s64max
HOST_DATA	0	event->group_leader->hw.ptsc	0-u64max
HOST_DATA	0	event->group_leader->hw.pwr_acc	0-u64max
HOST_DATA	0	event->group_leader->hw.saved_metric	0-u64max
HOST_DATA	0	event->group_leader->hw.saved_slots	0-u64max
HOST_DATA	0	event->hw->addr_filters_gen	0-u64max
HOST_DATA	0	event->hw->freq_count_stamp	0-u64max
HOST_DATA	0	event->hw->freq_time_stamp	0-u64max
HOST_DATA	0	event->hw->interrupts	0-u64max
HOST_DATA	0	event->hw->interrupts_seq	0-u64max
HOST_DATA	0	event->hw->sample_period	0-u64max
HOST_DATA	0	event->hw->state	s32min-s32max
HOST_DATA	0	event->hw.aux_config	0-u64max
HOST_DATA	0	event->hw.aux_paused	0-u32max
HOST_DATA	0	event->hw.branch_reg.alloc	s32min-s32max
HOST_DATA	0	event->hw.branch_reg.config	0-u64max
HOST_DATA	0	event->hw.branch_reg.idx	s32min-s32max
HOST_DATA	0	event->hw.branch_reg.reg	0-u32max
HOST_DATA	0	event->hw.conf	0-u64max
HOST_DATA	0	event->hw.conf1	0-u64max
HOST_DATA	0	event->hw.config	0-u64max
HOST_DATA	0	event->hw.config1	0-u64max
HOST_DATA	0	event->hw.config_base	0-u64max
HOST_DATA	0	event->hw.dyn_constraint	0-u64max
HOST_DATA	0	event->hw.event_base	0-u64max
HOST_DATA	0	event->hw.event_base_rdpmc	s32min-s32max
HOST_DATA	0	event->hw.extra_reg.alloc	s32min-s32max
HOST_DATA	0	event->hw.extra_reg.config	0-u64max
HOST_DATA	0	event->hw.extra_reg.idx	s32min-s32max
HOST_DATA	0	event->hw.extra_reg.reg	0-u32max
HOST_DATA	0	event->hw.flags	s32min-s32max
HOST_DATA	0	event->hw.hrtimer._softexpires	s64min-s64max
HOST_DATA	0	event->hw.hrtimer.is_hard	0-1
HOST_DATA	0	event->hw.hrtimer.is_lazy	0-1
HOST_DATA	0	event->hw.hrtimer.is_queued	0-1
HOST_DATA	0	event->hw.hrtimer.is_rel	0-1
HOST_DATA	0	event->hw.hrtimer.is_soft	0-1
HOST_DATA	0	event->hw.hrtimer.node.expires	s64min-s64max
HOST_DATA	0	event->hw.hrtimer.node.node.node.__rb_parent_color	1
HOST_DATA	0	event->hw.idx	s32min-s32max
HOST_DATA	0	event->hw.info.address	0-u64max
HOST_DATA	0	event->hw.info.len	0-255
HOST_DATA	0	event->hw.info.mask	0-u64max
HOST_DATA	0	event->hw.info.type	0-255
HOST_DATA	0	event->hw.iommu_bank	0-255
HOST_DATA	0	event->hw.iommu_cntr	0-255
HOST_DATA	0	event->hw.last_cpu	s32min-s32max
HOST_DATA	0	event->hw.last_period	0-u64max
HOST_DATA	0	event->hw.last_tag	0-u64max
HOST_DATA	0	event->hw.padding	0-u16max
HOST_DATA	0	event->hw.period_left.a.a.counter	s64min-s64max
HOST_DATA	0	event->hw.prev_count.a.a.counter	s64min-s64max
HOST_DATA	0	event->hw.ptsc	0-u64max
HOST_DATA	0	event->hw.pwr_acc	0-u64max
HOST_DATA	0	event->hw.saved_metric	0-u64max
HOST_DATA	0	event->hw.saved_slots	0-u64max
USER_DATA	0	event->attr.bp_addr	0-u64max[c]
USER_DATA	0	event->attr.bp_len	0-u64max
USER_DATA	0	event->attr.bp_type	2-4[c]
USER_DATA	0	event->attr.disabled	0[c]
USER_DATA	0	event->attr.sig_data	0-u64max
USER_DATA	0	event->hw.info.address	0-s32max[c]
USER_DATA	0	event->hw.info.mask	2,4-6,u64max[u]
UNITS	0	event	unit_byte
LOCK2	0	&event->mmap_mutex
HALF_LOCKED2		&parent_ctx->mutex
HALF_LOCKED2		_T->lock
HALF_LOCKED2	0	&event->child_mutex
TYPE_LOCK		(struct perf_event)->mmap_mutex

kernel/events/core.c perf_event_set_output() -> ring_buffer_attach()

Type	Parameter	Key	Value
PARAM_VALUE	0	event	4096-ptr_max
PARAM_VALUE	0	event->ctx	4096-ptr_max
PARAM_VALUE	0	event->ctx->callback_head.func	1-u64max
PARAM_VALUE	0	event->ctx->callback_head.next	0
PARAM_VALUE	0	event->ctx->refcount.refs.counter	(-1073741824),0-s32max
PARAM_VALUE	0	event->ctx->task->rcu.func	1-u64max
PARAM_VALUE	0	event->mmap_count.refs.counter	0
PARAM_VALUE	0	event->mmap_mutex.dep_map->name	0-255
PARAM_VALUE	0	event->mmap_mutex.first_waiter	0,4096-ptr_max
PARAM_VALUE	0	event->mmap_mutex.first_waiter->list.prev->next	5159360019465732096
PARAM_VALUE	0	event->mmap_mutex.osq.tail.counter	0-s32max
PARAM_VALUE	0	event->mmap_mutex.wait_lock.dep_map->name	0-255
PARAM_VALUE	0	event->mmap_mutex.wait_lock.owner	(-1)
PARAM_VALUE	0	event->mmap_mutex.wait_lock.owner_cpu	u32max
PARAM_VALUE	0	event->pmu	0,4096-ptr_max
PARAM_VALUE	0	event->state	(-3)-s32max
PARAM_VALUE	1	rb	0,4096-ptr_max
PARAM_VALUE	1	rb->mmap_count.refs.counter	s32min-(-1),1-s32max
PARAM_VALUE	1	rb->refcount.refs.counter	(-1073741824),0-s32max
BUF_SIZE	0	event	s32min-(-2),1-s32max
BUF_SIZE	0	event	s32min-(-2),1-s32max
CAPPED_DATA	0	event->ctx	1
CAPPED_DATA	0	event->pmu	1
CAPPED_DATA	0	&event->mmap_mutex	1
DATA_SOURCE	0	event	$0
FUZZY_MAX	0	event->state	(-3)
NOCHECK_CALL
HALF_LOCKED2	0	&event->mmap_mutex

kernel/events/core.c perf_mmap() -> ring_buffer_attach()

Type	Parameter	Key	Value
PARAM_VALUE	0	event	4096-ptr_max
PARAM_VALUE	0	event->mmap_count.refs.counter	1
PARAM_VALUE	0	event->pmu	0,4096-ptr_max
PARAM_VALUE	0	event->rb	4096-ptr_max
PARAM_VALUE	0	event->rb->mmap_count.refs.counter	(-1073741824),0-s32max
PARAM_VALUE	0	event->rb->mmap_user	4096-ptr_max
PARAM_VALUE	0	event->state	(-3)-s32max
PARAM_VALUE	1	rb	0
BUF_SIZE	0	event	(-1),1216
BUF_SIZE	0	event	(-1),1216
FUZZY_MAX	0	event->state	(-3)
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
LOCK2		_T->lock
HALF_LOCKED2		&ipcp->lock

kernel/events/core.c perf_mmap_close() -> ring_buffer_attach()

Type	Parameter	Key	Value
PARAM_VALUE	0	event	4096-ptr_max
PARAM_VALUE	0	event->mmap_mutex.dep_map->name	0-255
PARAM_VALUE	0	event->mmap_mutex.first_waiter	0,4096-ptr_max
PARAM_VALUE	0	event->mmap_mutex.first_waiter->list.prev->next	5159360019465732096
PARAM_VALUE	0	event->mmap_mutex.osq.tail.counter	0-s32max
PARAM_VALUE	0	event->mmap_mutex.wait_lock.dep_map->name	0-255
PARAM_VALUE	0	event->mmap_mutex.wait_lock.owner	(-1)
PARAM_VALUE	0	event->mmap_mutex.wait_lock.owner_cpu	u32max
PARAM_VALUE	1	rb	0
BUF_SIZE	0	event	s32min-(-2),1-s32max
BUF_SIZE	0	event	s32min-(-2),1-s32max
CAPPED_DATA	0	&event->mmap_mutex	1
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
LOCK2	0	&event->mmap_mutex
HALF_LOCKED2		_T->lock
TYPE_LOCK		(struct perf_event)->mmap_mutex

kernel/events/core.c perf_mmap_close() -> ring_buffer_attach()

Type	Parameter	Key	Value
PARAM_VALUE	0	event	4096-ptr_max
PARAM_VALUE	0	event->mmap_mutex.dep_map->name	0-255
PARAM_VALUE	0	event->mmap_mutex.first_waiter	0,4096-ptr_max
PARAM_VALUE	0	event->mmap_mutex.first_waiter->list.prev->next	5159360019465732096
PARAM_VALUE	0	event->mmap_mutex.first_waiter->task->blocked_lock.dep_map->name	0-255
PARAM_VALUE	0	event->mmap_mutex.first_waiter->task->blocked_lock.owner	(-1)
PARAM_VALUE	0	event->mmap_mutex.first_waiter->task->blocked_lock.owner_cpu	4294967295
PARAM_VALUE	0	event->mmap_mutex.first_waiter->task->blocked_lock.raw_lock.val.counter	s32min-s32max
PARAM_VALUE	0	event->mmap_mutex.first_waiter->task->usage.refs.counter	s32min-s32max
PARAM_VALUE	0	event->mmap_mutex.osq.tail.counter	0-s32max
PARAM_VALUE	0	event->mmap_mutex.wait_lock.dep_map->name	0-255
PARAM_VALUE	0	event->mmap_mutex.wait_lock.owner	(-1)
PARAM_VALUE	0	event->mmap_mutex.wait_lock.owner_cpu	u32max
PARAM_VALUE	0	event->rb	4096-ptr_max
PARAM_VALUE	0	event->rb->callback_head.func	1-u64max
PARAM_VALUE	0	event->rb->callback_head.next	0
PARAM_VALUE	0	event->rb->event_lock.rlock.dep_map->name	0-255
PARAM_VALUE	1	rb	0
CAPPED_DATA	0	event->rb	1
CAPPED_DATA	0	&event->mmap_mutex	1
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
LOCK2	0	&event->mmap_mutex
HALF_LOCKED2		_T->lock
TYPE_LOCK		(struct perf_event)->mmap_mutex

kernel/events/core.c perf_mmap_rb() -> ring_buffer_attach()

Type	Parameter	Key	Value
PARAM_VALUE	0	event	4096-ptr_max
PARAM_VALUE	0	event->ctx	4096-ptr_max
PARAM_VALUE	0	event->mmap_count.refs.counter	s32min-(-1),1-s32max
PARAM_VALUE	0	event->rb	4096-ptr_max
PARAM_VALUE	0	event->rb->mmap_count.refs.counter	(-1073741824),0-s32max
PARAM_VALUE	0	event->state	(-3)-s32max
PARAM_VALUE	1	rb	0
BUF_SIZE	0	event	(-1),1216
BUF_SIZE	0	event	(-1),1216
DATA_SOURCE	0	event	$1
FUZZY_MAX	0	event->state	(-3)
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
LOCK2		_T->lock
HALF_LOCKED2		&ipcp->lock

kernel/events/core.c perf_mmap_rb() -> ring_buffer_attach()

Type	Parameter	Key	Value
PARAM_VALUE	0	event	4096-ptr_max
PARAM_VALUE	0	event->ctx	4096-ptr_max
PARAM_VALUE	0	event->rb	0
PARAM_VALUE	0	event->rb->callback_head.func	1-u64max
PARAM_VALUE	0	event->rb->callback_head.next	0
PARAM_VALUE	0	event->rb->event_lock.rlock.dep_map->name	0-255
PARAM_VALUE	0	event->rb->mmap_count.refs.counter	(-1073741824),0-s32max
PARAM_VALUE	0	event->state	(-3)-s32max
PARAM_VALUE	1	rb	4096-ptr_max
PARAM_VALUE	1	rb->aux_mutex.dep_map->name	0-255
PARAM_VALUE	1	rb->aux_mutex.first_waiter	0
PARAM_VALUE	1	rb->aux_mutex.magic	4096-ptr_max
PARAM_VALUE	1	rb->aux_mutex.osq.tail.counter	0
PARAM_VALUE	1	rb->aux_mutex.owner.counter	0
PARAM_VALUE	1	rb->data_pages	4096-ptr_max
PARAM_VALUE	1	rb->event_list.next	4096-ptr_max
PARAM_VALUE	1	rb->event_list.next->next	4096-ptr_max
PARAM_VALUE	1	rb->event_list.prev	4096-ptr_max
PARAM_VALUE	1	rb->event_list.prev->next	4096-ptr_max
PARAM_VALUE	1	rb->event_list.prev->prev	4096-ptr_max
PARAM_VALUE	1	rb->mmap_count.refs.counter	1
PARAM_VALUE	1	rb->mmap_locked	0-556198264702
PARAM_VALUE	1	rb->mmap_user	4096-ptr_max
PARAM_VALUE	1	rb->overwrite	0-1
PARAM_VALUE	1	rb->paused	1
PARAM_VALUE	1	rb->refcount.refs.counter	1
PARAM_VALUE	1	rb->user_page	1-u64max
BUF_SIZE	0	event	(-1),1216
BUF_SIZE	0	event	(-1),1216
BUF_SIZE	1	rb	560
BUF_SIZE	1	rb	560
DATA_SOURCE	0	event	$1
DATA_SOURCE	1	rb	r rb_alloc
FUZZY_MAX	0	event->state	(-3)
RX_PATH
TASK_NOT_RUNNING
NOCHECK_CALL
LOCK2		_T->lock
HALF_LOCKED2		&ipcp->lock