# stap_compile TEST_NAME flags script args
# - TEST_NAME is the name of the current test
# - compile indicates whether the script is supposed to compile
# - script is the script to compile
# Additional arguments are passed to stap as-is.
proc stap_compile { TEST_NAME compile script args } {
    set cmd [concat stap {-v -p4 -e} $script $args]

    verbose -log "running $cmd" 
    eval spawn $cmd
    set compile_errors 0
    expect {
	-re {^Pass\ [1234]:[^\n\r]+\ in\ [^\n\r]+\ ms.\r\n} {exp_continue}
	-re {^Pass\ [34]: using cached [^\r\n]+\r\n} {exp_continue}
	-re "^WARNING" {exp_continue}
        # pass-4 output
	-re {^/[^\r\n]+.ko\r\n} {exp_continue}
	-re "parse error" { incr compile_errors 1; exp_continue}
	-re "compilation failed" {incr compile_errors 1; exp_continue}
	-re "semantic error:" {incr compile_errors 1; exp_continue}
    }
    set res [wait -i $spawn_id]
    catch close
    set res [lindex $res 3]

    if {($res == 0 && $compile_errors == 0)
	|| ($res != 0 && $compile_errors > 0)} {
	# Expected case. Ignore. Real pass/fail result will come below.
    } else {
	# stap result doesn't match errors seen.
	if {$res == 0} {
	    fail "${TEST_NAME}_compile successfull, but got error messages"
	} else {
	    fail "${TEST_NAME}_compile failed, but got no error messages"
	}
    }

    # If we've got compile errors and the script was supposed to
    # compile, fail.
    if {$compile_errors > 0} {
	if {$compile == 1} {
	    fail "$TEST_NAME compilation failed"
	} else {
	    pass "$TEST_NAME compilation failed correctly"
	}
    } else {
	if {$compile == 1} {
	    pass "$TEST_NAME compilation succeeded"
	} else {
	    fail "$TEST_NAME compilation succeeded unexpectedly"
	}
    }
}