tgkill

Implemented in Antinomie 0.7.0 · Syscall list

Synopsis

long tgkill(pid_t tgid, pid_t pid, int sig);

Number (x86-64)	234
ABI	common
Kernel entry point	sys_tgkill

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

Description

Sends a signal to one thread of a given process.

Arguments

Name	Type	Meaning
tgid (arg0)	pid_t	Thread group (process) id.
pid (arg1)	pid_t	Process or thread id.
sig (arg2)	int	Signal number.

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
-22	EINVAL	An argument is invalid.
-3	ESRCH	No such process or thread.

Man page

tgkill(2) on man7.org

Captured by Antinomie

Coverage mark: Implemented. All arguments are plain values, recorded as the raw argument words at entry. There is no pointee to copy and no known gap.

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
tgid (arg0)	Entry	raw scalar word	args.0, args.tgid
pid (arg1)	Entry	raw scalar word	args.1, args.pid
sig (arg2)	Entry	raw scalar word	args.2, args.sig

Filter fields

• Result: ret, syscall.errno, syscall.success, syscall.duration_ns.
• Argument words: args.tgid (arg0), args.pid (arg1), args.sig (arg2); args.0 to args.5 by position.

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.