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# sched_yield ________________________________________________
# long sys_sched_yield(void)
#
@define _SYSCALL_SCHED_YIELD_NAME
%(
name = "sched_yield"
%)
@define _SYSCALL_SCHED_YIELD_ARGSTR
%(
argstr = ""
%)
probe syscall.sched_yield = dw_syscall.sched_yield !, nd_syscall.sched_yield {}
probe syscall.sched_yield.return = dw_syscall.sched_yield.return !,
nd_syscall.sched_yield.return {}
# dw_sched_yield _____________________________________________________
probe dw_syscall.sched_yield = kernel.function("sys_sched_yield").call
{
@_SYSCALL_SCHED_YIELD_NAME
@_SYSCALL_SCHED_YIELD_ARGSTR
}
probe dw_syscall.sched_yield.return = kernel.function("sys_sched_yield").return
{
@_SYSCALL_SCHED_YIELD_NAME
@SYSC_RETVALSTR($return)
}
# nd_sched_yield _____________________________________________________
probe nd_syscall.sched_yield = nd1_syscall.sched_yield!, nd2_syscall.sched_yield!, tp_syscall.sched_yield
{ }
probe nd1_syscall.sched_yield = kprobe.function("sys_sched_yield")
{
@_SYSCALL_SCHED_YIELD_NAME
@_SYSCALL_SCHED_YIELD_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.sched_yield = kprobe.function(@arch_syscall0_prefix "sys_sched_yield") ?
{
@_SYSCALL_SCHED_YIELD_NAME
@_SYSCALL_SCHED_YIELD_ARGSTR
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sched_yield = kernel.trace("sys_enter") ?
{
@__syscall_compat_gate(@const("__NR_sched_yield"), @const("__NR_compat_sched_yield"))
@_SYSCALL_SCHED_YIELD_NAME
@_SYSCALL_SCHED_YIELD_ARGSTR
}
probe nd_syscall.sched_yield.return = nd1_syscall.sched_yield.return!, nd2_syscall.sched_yield.return!, tp_syscall.sched_yield.return
{ }
probe nd1_syscall.sched_yield.return = kprobe.function("sys_sched_yield").return
{
@_SYSCALL_SCHED_YIELD_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.sched_yield.return = kprobe.function(@arch_syscall0_prefix "sys_sched_yield").return ?
{
@_SYSCALL_SCHED_YIELD_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.sched_yield.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_sched_yield"), @const("__NR_compat_sched_yield"))
@_SYSCALL_SCHED_YIELD_NAME
@SYSC_RETVALSTR($ret)
}
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