nanosleep

Implemented in Antinomie 0.7.0 · Syscall list

Synopsis

long nanosleep(struct __kernel_timespec *rqtp, struct __kernel_timespec *rmtp);

Number (x86-64)	35
ABI	common
Kernel entry point	sys_nanosleep

This is the raw kernel prototype from the pinned Linux 6.12.94 schema, not the libc wrapper.

Description

Suspends the thread for a given time. If a signal interrupts it, the remaining time is stored.

Arguments

Name	Type	Meaning
rqtp (arg0)	struct __kernel_timespec *	Requested sleep time.
rmtp (arg1)	struct __kernel_timespec *	Where to store the remaining sleep time.

Return value

On success: 0.

In an Antinomie trace the Return column and the ret filter field show the raw kernel return value. On failure that is the negative errno, for example -2 for ENOENT, not the -1 plus errno that the libc wrapper gives. syscall.errno holds the positive errno and syscall.success is false.

Common errors

Raw return	Name	Meaning
-14	EFAULT	A pointer argument points outside the accessible address space.
-4	EINTR	The call was interrupted by a signal.
-22	EINVAL	An argument is invalid.

Man page

nanosleep(2) on man7.org

Captured by Antinomie

Coverage mark: Implemented. Every pointer argument has a capture rule in the pinned kernel patch and none of them records a “no decoder”, “address only” or “not observed” gap on any code path. Individual values can still be incomplete on a particular call; see the capture statuses.

Every call is recorded as an Entry record (the six argument words and the pointees copied at entry) and an Exit record (the return value and the pointees copied at exit).

Arguments

Argument	When	How	Recorded field key	Condition
rqtp (arg0)	Entry	the pointer itself, as a raw word	args.0, args.raw[0]
↳ pointee	Entry	structure timespec (fixed size)	arg0.data	always
rmtp (arg1)	Entry	the pointer itself, as a raw word	args.1, args.raw[1]
↳ pointee	Exit	structure timespec (fixed size)	arg1.data	the call was interrupted (result -EINTR); records the time left

Filter fields

• Result: ret, syscall.errno, syscall.success, syscall.duration_ns.
• Argument words: args.rqtp (arg0), args.rmtp (arg1); args.0 to args.5 by position.
• Structure timespec[2] behind rqtp (arg0): args.rqtp.<member> for tv_nsec, tv_sec.
• Structure timespec[2] behind rmtp (arg1): args.rmtp.<member> for tv_nsec, tv_sec.

See Syscall Trace filter for the full syntax.

For what the capture statuses mean, see Capture statuses. For what is never recorded, see Known gaps.