set test "caller"

if {! [installtest_p]} { untested "$test"; return }

set test_script {
    global caller_str

    probe begin {
        printf("systemtap starting probe\n")
    }

    probe kernel.function("vfs_write") {
	caller_str = caller()
	exit()
    }

    probe end {
        printf("systemtap ending probe\n")
	printf("%s\n", caller_str)
    }
}

# We expect that the caller of vfs_write() will be sys_write(). This
# works on most systems, except for ppc64 (3.10.0-327.el7.ppc64),
# where vfs_write() can get inlined. So, we expect system_call() or
# vfs_write() on ppc64.
if {[string match ppc* $::tcl_platform(machine)]} {
    set output {([Ss]y[Ss]_write|system_call) 0x[0-9a-f]+\r\n}
} else {
    set output {[Ss]y[Ss]_write 0x[0-9a-f]+\r\n}
}
stap_run $test no_load $output -e $test_script -c "echo hi > /dev/null"