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set test "func_overload"
if {![installtest_p]} {untested $test; return}
proc run_test {test script expected} {
set success 0
spawn stap -g -e $script
expect {
-timeout 30
-re "$expected" {pass $test}
default {fail $test}
}
catch { close }; catch { wait }
}
# unconditional next
set script1 {
function f() {
next
return "first function"
}
function f() {
return "second function"
}
probe begin {
println(f())
exit()
}
}
# overload using global variable
set script2 {
global x = 0
function f() {
if (x == 100)
return "first function"
else
next
}
function f() {
return "second function"
}
probe begin {
println(f())
x = 100
println(f())
exit()
}
}
# overload using function arguments
set script3 {
function f(x, y) {
if (x == 500 || y == "hello")
return "first function"
else
next
}
function f(x, y) {
return "second function"
}
probe begin {
println(f(200, "asd"))
println(f(900, "hello"))
exit()
}
}
# overload using argument and global variable
set script4 {
global x = 0
function f(y) {
if (x == 100 || y == 200)
return "first function"
else
next
}
function f(x) {
return "second function"
}
probe begin {
println(f(0))
println(f(200))
x = 100
println(f(0))
exit()
}
}
# priority ordering
set script5 {
function f():1 %{
STAP_NEXT;
STAP_PRINTF("first function\n");
%}
function f():3 {
println("second function")
}
function f():2 %{
STAP_PRINTF("third function\n");
%}
probe begin {
f()
exit()
}
}
# compile time arity overloading
set script6 {
function adder(x) {
return x
}
function adder(x, y) {
return x + y
}
function adder(x, y, z) {
return x + y + z
}
probe begin {
println(adder(1))
println(adder(1, 2))
println(adder(1, 2, 3))
exit()
}
}
# runtime overload and compile time overload
set script7 {
function adder(x) {
if (x != 1)
return 1000
else
next
}
function adder(x) {
return x
}
function adder(x, y) {
return x + y
}
function adder(x, y, z) {
return x + y + z
}
probe begin {
println(adder(0))
println(adder(1))
println(adder(1, 2))
println(adder(1, 2, 3))
exit()
}
}
# all functions exhausted runtime error
set script8 {
function f() {
next
return 0
}
probe begin {
println(f())
exit()
}
}
run_test unconditional_next $script1 "second function\r\n"
run_test runtime_global $script2 "second function\r\nfirst function\r\n"
run_test runtime_arguments $script3 "second function\r\nfirst function\r\n"
run_test runtime_conditions $script4 "second function\r\nfirst function\r\nfirst function\r\n"
run_test runtime_priority $script5 "third function\r\n"
run_test arity $script6 "1\r\n3\r\n6\r\n"
run_test mix $script7 "1000\r\n1\r\n3\r\n6\r\n"
run_test overload_exception $script8 "all functions exhausted"
|
