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Copy pathapi.lua
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1416 lines (1182 loc) · 39.1 KB
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-- $Id: testes/api.lua $
-- See Copyright Notice in file lua.h
if T==nil then
(Message or print)('\n >>> testC not active: skipping API tests <<<\n')
return
end
local debug = require "debug"
local pack = table.pack
local function tcheck (t1, t2)
assert(t1.n == (t2.n or #t2) + 1)
for i = 2, t1.n do assert(t1[i] == t2[i - 1]) end
end
local function checkerr (msg, f, ...)
local stat, err = pcall(f, ...)
assert(not stat and string.find(err, msg))
end
print('testing C API')
local a = T.testC("pushvalue R; return 1")
assert(a == debug.getregistry())
-- absindex
assert(T.testC("settop 10; absindex -1; return 1") == 10)
assert(T.testC("settop 5; absindex -5; return 1") == 1)
assert(T.testC("settop 10; absindex 1; return 1") == 1)
assert(T.testC("settop 10; absindex R; return 1") < -10)
-- testing alignment
a = T.d2s(12458954321123.0)
assert(a == string.pack("d", 12458954321123.0))
assert(T.s2d(a) == 12458954321123.0)
local a,b,c = T.testC("pushnum 1; pushnum 2; pushnum 3; return 2")
assert(a == 2 and b == 3 and not c)
local f = T.makeCfunc("pushnum 1; pushnum 2; pushnum 3; return 2")
a,b,c = f()
assert(a == 2 and b == 3 and not c)
-- test that all trues are equal
a,b,c = T.testC("pushbool 1; pushbool 2; pushbool 0; return 3")
assert(a == b and a == true and c == false)
a,b,c = T.testC"pushbool 0; pushbool 10; pushnil;\
tobool -3; tobool -3; tobool -3; return 3"
assert(a==false and b==true and c==false)
a,b,c = T.testC("gettop; return 2", 10, 20, 30, 40)
assert(a == 40 and b == 5 and not c)
local t = pack(T.testC("settop 5; return *", 2, 3))
tcheck(t, {n=4,2,3})
t = pack(T.testC("settop 0; settop 15; return 10", 3, 1, 23))
assert(t.n == 10 and t[1] == nil and t[10] == nil)
t = pack(T.testC("remove -2; return *", 2, 3, 4))
tcheck(t, {n=2,2,4})
t = pack(T.testC("insert -1; return *", 2, 3))
tcheck(t, {n=2,2,3})
t = pack(T.testC("insert 3; return *", 2, 3, 4, 5))
tcheck(t, {n=4,2,5,3,4})
t = pack(T.testC("replace 2; return *", 2, 3, 4, 5))
tcheck(t, {n=3,5,3,4})
t = pack(T.testC("replace -2; return *", 2, 3, 4, 5))
tcheck(t, {n=3,2,3,5})
t = pack(T.testC("remove 3; return *", 2, 3, 4, 5))
tcheck(t, {n=3,2,4,5})
t = pack(T.testC("copy 3 4; return *", 2, 3, 4, 5))
tcheck(t, {n=4,2,3,3,5})
t = pack(T.testC("copy -3 -1; return *", 2, 3, 4, 5))
tcheck(t, {n=4,2,3,4,3})
do -- testing 'rotate'
local t = {10, 20, 30, 40, 50, 60}
for i = -6, 6 do
local s = string.format("rotate 2 %d; return 7", i)
local t1 = pack(T.testC(s, 10, 20, 30, 40, 50, 60))
tcheck(t1, t)
table.insert(t, 1, table.remove(t))
end
t = pack(T.testC("rotate -2 1; return *", 10, 20, 30, 40))
tcheck(t, {10, 20, 40, 30})
t = pack(T.testC("rotate -2 -1; return *", 10, 20, 30, 40))
tcheck(t, {10, 20, 40, 30})
-- some corner cases
t = pack(T.testC("rotate -1 0; return *", 10, 20, 30, 40))
tcheck(t, {10, 20, 30, 40})
t = pack(T.testC("rotate -1 1; return *", 10, 20, 30, 40))
tcheck(t, {10, 20, 30, 40})
t = pack(T.testC("rotate 5 -1; return *", 10, 20, 30, 40))
tcheck(t, {10, 20, 30, 40})
end
-- testing warnings
T.testC([[
warningC "#This should be a"
warningC " single "
warning "warning"
warningC "#This should be "
warning "another one"
]])
-- testing message handlers
do
local f = T.makeCfunc[[
getglobal error
pushstring bola
pcall 1 1 1 # call 'error' with given handler
pushstatus
return 2 # return error message and status
]]
local msg, st = f(string.upper) -- function handler
assert(st == "ERRRUN" and msg == "BOLA")
local msg, st = f(string.len) -- function handler
assert(st == "ERRRUN" and msg == 4)
end
t = pack(T.testC("insert 3; pushvalue 3; remove 3; pushvalue 2; remove 2; \
insert 2; pushvalue 1; remove 1; insert 1; \
insert -2; pushvalue -2; remove -3; return *",
2, 3, 4, 5, 10, 40, 90))
tcheck(t, {n=7,2,3,4,5,10,40,90})
t = pack(T.testC("concat 5; return *", "alo", 2, 3, "joao", 12))
tcheck(t, {n=1,"alo23joao12"})
-- testing MULTRET
t = pack(T.testC("call 2,-1; return *",
function (a,b) return 1,2,3,4,a,b end, "alo", "joao"))
tcheck(t, {n=6,1,2,3,4,"alo", "joao"})
do -- test returning more results than fit in the caller stack
local a = {}
for i=1,1000 do a[i] = true end; a[999] = 10
local b = T.testC([[pcall 1 -1 0; pop 1; tostring -1; return 1]],
table.unpack, a)
assert(b == "10")
end
do -- testing multiple returns
local function foo (n)
if n > 0 then return n, foo(n - 1) end
end
local t = {T.testC("call 1 10; return 10", foo, 20)}
assert(t[1] == 20 and t[10] == 11 and t[11] == nil)
local t = table.pack(T.testC("call 1 10; return 10", foo, 2))
assert(t[1] == 2 and t[2] == 1 and t[3] == nil and t.n == 10)
local t = {T.testC([[
checkstack 300 "error"; call 1 250; return 250]], foo, 250)}
assert(t[1] == 250 and t[250] == 1 and t[251] == nil)
end
-- testing globals
_G.AA = 14; _G.BB = "a31"
local a = {T.testC[[
getglobal AA;
getglobal BB;
getglobal BB;
setglobal AA;
return *
]]}
assert(a[2] == 14 and a[3] == "a31" and a[4] == nil and _G.AA == "a31")
_G.AA, _G.BB = nil
-- testing arith
assert(T.testC("pushnum 10; pushnum 20; arith /; return 1") == 0.5)
assert(T.testC("pushnum 10; pushnum 20; arith -; return 1") == -10)
assert(T.testC("pushnum 10; pushnum -20; arith *; return 1") == -200)
assert(T.testC("pushnum 10; pushnum 3; arith ^; return 1") == 1000)
assert(T.testC("pushnum 10; pushstring 20; arith /; return 1") == 0.5)
assert(T.testC("pushstring 10; pushnum 20; arith -; return 1") == -10)
assert(T.testC("pushstring 10; pushstring -20; arith *; return 1") == -200)
assert(T.testC("pushstring 10; pushstring 3; arith ^; return 1") == 1000)
assert(T.testC("arith /; return 1", 2, 0) == 10.0/0)
a = T.testC("pushnum 10; pushint 3; arith \\; return 1")
assert(a == 3.0 and math.type(a) == "float")
a = T.testC("pushint 10; pushint 3; arith \\; return 1")
assert(a == 3 and math.type(a) == "integer")
a = assert(T.testC("pushint 10; pushint 3; arith +; return 1"))
assert(a == 13 and math.type(a) == "integer")
a = assert(T.testC("pushnum 10; pushint 3; arith +; return 1"))
assert(a == 13 and math.type(a) == "float")
a,b,c = T.testC([[pushnum 1;
pushstring 10; arith _;
pushstring 5; return 3]])
assert(a == 1 and b == -10 and c == "5")
local mt = {
__add = function (a,b) return setmetatable({a[1] + b[1]}, mt) end,
__mod = function (a,b) return setmetatable({a[1] % b[1]}, mt) end,
__unm = function (a) return setmetatable({a[1]* 2}, mt) end}
a,b,c = setmetatable({4}, mt),
setmetatable({8}, mt),
setmetatable({-3}, mt)
local x,y,z = T.testC("arith +; return 2", 10, a, b)
assert(x == 10 and y[1] == 12 and z == nil)
assert(T.testC("arith %; return 1", a, c)[1] == 4%-3)
assert(T.testC("arith _; arith +; arith %; return 1", b, a, c)[1] ==
8 % (4 + (-3)*2))
-- errors in arithmetic
checkerr("divide by zero", T.testC, "arith \\", 10, 0)
checkerr("%%0", T.testC, "arith %", 10, 0)
-- testing lessthan and lessequal
assert(T.testC("compare LT 2 5, return 1", 3, 2, 2, 4, 2, 2))
assert(T.testC("compare LE 2 5, return 1", 3, 2, 2, 4, 2, 2))
assert(not T.testC("compare LT 3 4, return 1", 3, 2, 2, 4, 2, 2))
assert(T.testC("compare LE 3 4, return 1", 3, 2, 2, 4, 2, 2))
assert(T.testC("compare LT 5 2, return 1", 4, 2, 2, 3, 2, 2))
assert(not T.testC("compare LT 2 -3, return 1", "4", "2", "2", "3", "2", "2"))
assert(not T.testC("compare LT -3 2, return 1", "3", "2", "2", "4", "2", "2"))
-- non-valid indices produce false
assert(not T.testC("compare LT 1 4, return 1"))
assert(not T.testC("compare LE 9 1, return 1"))
assert(not T.testC("compare EQ 9 9, return 1"))
local b = {__lt = function (a,b) return a[1] < b[1] end,
__le = function (a,b) return a[1] <= b[1] end}
local a1,a3,a4 = setmetatable({1}, b),
setmetatable({3}, b),
setmetatable({4}, b)
assert(T.testC("compare LT 2 5, return 1", a3, 2, 2, a4, 2, 2))
assert(T.testC("compare LE 2 5, return 1", a3, 2, 2, a4, 2, 2))
assert(T.testC("compare LT 5 -6, return 1", a4, 2, 2, a3, 2, 2))
a,b = T.testC("compare LT 5 -6, return 2", a1, 2, 2, a3, 2, 20)
assert(a == 20 and b == false)
a,b = T.testC("compare LE 5 -6, return 2", a1, 2, 2, a3, 2, 20)
assert(a == 20 and b == false)
a,b = T.testC("compare LE 5 -6, return 2", a1, 2, 2, a1, 2, 20)
assert(a == 20 and b == true)
do -- testing lessthan and lessequal with metamethods
local mt = {__lt = function (a,b) return a[1] < b[1] end,
__le = function (a,b) return a[1] <= b[1] end,
__eq = function (a,b) return a[1] == b[1] end}
local function O (x)
return setmetatable({x}, mt)
end
local a, b = T.testC("compare LT 2 3; pushint 10; return 2", O(1), O(2))
assert(a == true and b == 10)
local a, b = T.testC("compare LE 2 3; pushint 10; return 2", O(3), O(2))
assert(a == false and b == 10)
local a, b = T.testC("compare EQ 2 3; pushint 10; return 2", O(3), O(3))
assert(a == true and b == 10)
end
-- testing length
local t = setmetatable({x = 20}, {__len = function (t) return t.x end})
a,b,c = T.testC([[
len 2;
Llen 2;
objsize 2;
return 3
]], t)
assert(a == 20 and b == 20 and c == 0)
t.x = "234"; t[1] = 20
a,b,c = T.testC([[
len 2;
Llen 2;
objsize 2;
return 3
]], t)
assert(a == "234" and b == 234 and c == 1)
t.x = print; t[1] = 20
a,c = T.testC([[
len 2;
objsize 2;
return 2
]], t)
assert(a == print and c == 1)
-- testing __concat
a = setmetatable({x="u"}, {__concat = function (a,b) return a.x..'.'..b.x end})
x,y = T.testC([[
pushnum 5
pushvalue 2;
pushvalue 2;
concat 2;
pushvalue -2;
return 2;
]], a, a)
assert(x == a..a and y == 5)
-- concat with 0 elements
assert(T.testC("concat 0; return 1") == "")
-- concat with 1 element
assert(T.testC("concat 1; return 1", "xuxu") == "xuxu")
-- testing lua_is
local function B (x) return x and 1 or 0 end
local function count (x, n)
n = n or 2
local prog = [[
isnumber %d;
isstring %d;
isfunction %d;
iscfunction %d;
istable %d;
isuserdata %d;
isnil %d;
isnull %d;
return 8
]]
prog = string.format(prog, n, n, n, n, n, n, n, n)
local a,b,c,d,e,f,g,h = T.testC(prog, x)
return B(a)+B(b)+B(c)+B(d)+B(e)+B(f)+B(g)+(100*B(h))
end
assert(count(3) == 2)
assert(count('alo') == 1)
assert(count('32') == 2)
assert(count({}) == 1)
assert(count(print) == 2)
assert(count(function () end) == 1)
assert(count(nil) == 1)
assert(count(io.stdin) == 1)
assert(count(nil, 15) == 100)
-- testing lua_to...
local function to (s, x, n)
n = n or 2
return T.testC(string.format("%s %d; return 1", s, n), x)
end
local null = T.pushuserdata(0)
local hfunc = string.gmatch("", "") -- a "heavy C function" (with upvalues)
assert(debug.getupvalue(hfunc, 1))
assert(to("tostring", {}) == nil)
assert(to("tostring", "alo") == "alo")
assert(to("tostring", 12) == "12")
assert(to("tostring", 12, 3) == nil)
assert(to("objsize", {}) == 0)
assert(to("objsize", {1,2,3}) == 3)
assert(to("objsize", "alo\0\0a") == 6)
assert(to("objsize", T.newuserdata(0)) == 0)
assert(to("objsize", T.newuserdata(101)) == 101)
assert(to("objsize", 124) == 0)
assert(to("objsize", true) == 0)
assert(to("tonumber", {}) == 0)
assert(to("tonumber", "12") == 12)
assert(to("tonumber", "s2") == 0)
assert(to("tonumber", 1, 20) == 0)
assert(to("topointer", 10) == null)
assert(to("topointer", true) == null)
assert(to("topointer", nil) == null)
assert(to("topointer", "abc") ~= null)
assert(to("topointer", string.rep("x", 10)) ==
to("topointer", string.rep("x", 10))) -- short strings
do -- long strings
local s1 = string.rep("x", 300)
local s2 = string.rep("x", 300)
assert(to("topointer", s1) ~= to("topointer", s2))
end
assert(to("topointer", T.pushuserdata(20)) ~= null)
assert(to("topointer", io.read) ~= null) -- light C function
assert(to("topointer", hfunc) ~= null) -- "heavy" C function
assert(to("topointer", function () end) ~= null) -- Lua function
assert(to("topointer", io.stdin) ~= null) -- full userdata
assert(to("func2num", 20) == 0)
assert(to("func2num", T.pushuserdata(10)) == 0)
assert(to("func2num", io.read) ~= 0) -- light C function
assert(to("func2num", hfunc) ~= 0) -- "heavy" C function (with upvalue)
a = to("tocfunction", math.deg)
assert(a(3) == math.deg(3) and a == math.deg)
print("testing panic function")
do
-- trivial error
assert(T.checkpanic("pushstring hi; error") == "hi")
-- thread status inside panic (bug in 5.4.4)
assert(T.checkpanic("pushstring hi; error", "threadstatus; return 2") ==
"ERRRUN")
-- using the stack inside panic
assert(T.checkpanic("pushstring hi; error;",
[[checkstack 5 XX
pushstring ' alo'
pushstring ' mundo'
concat 3]]) == "hi alo mundo")
-- "argerror" without frames
assert(T.checkpanic("loadstring 4 name bt") ==
"bad argument #4 (string expected, got no value)")
-- memory error + thread status
local x = T.checkpanic(
[[ alloccount 0 # force a memory error in next line
newtable
]],
[[
alloccount -1 # allow free allocations again
pushstring XX
threadstatus
concat 2 # to make sure message came from here
return 1
]])
T.alloccount()
assert(x == "XX" .. "not enough memory")
-- stack error
if not _soft then
local msg = T.checkpanic[[
pushstring "function f() f() end"
loadstring -1 name t; call 0 0
getglobal f; call 0 0
]]
assert(string.find(msg, "stack overflow"))
end
-- exit in panic still close to-be-closed variables
assert(T.checkpanic([[
pushstring "return {__close = function () Y = 'ho'; end}"
newtable
loadstring -2 name t
call 0 1
setmetatable -2
toclose -1
pushstring "hi"
error
]],
[[
getglobal Y
concat 2 # concat original error with global Y
]]) == "hiho")
end
-- testing deep C stack
if not _soft then
print("testing stack overflow")
collectgarbage("stop")
checkerr("XXXX", T.testC, "checkstack 1000023 XXXX") -- too deep
-- too deep (with no message)
checkerr("^stack overflow$", T.testC, "checkstack 1000023 ''")
local s = string.rep("pushnil;checkstack 1 XX;", 1000000)
checkerr("overflow", T.testC, s)
collectgarbage("restart")
print'+'
end
local lim = _soft and 500 or 12000
local prog = {"checkstack " .. (lim * 2 + 100) .. "msg", "newtable"}
for i = 1,lim do
prog[#prog + 1] = "pushnum " .. i
prog[#prog + 1] = "pushnum " .. i * 10
end
prog[#prog + 1] = "rawgeti R !G" -- get global table in registry
prog[#prog + 1] = "insert " .. -(2*lim + 2)
for i = 1,lim do
prog[#prog + 1] = "settable " .. -(2*(lim - i + 1) + 1)
end
prog[#prog + 1] = "return 2"
prog = table.concat(prog, ";")
local g, t = T.testC(prog)
assert(g == _G)
for i = 1,lim do assert(t[i] == i*10); t[i] = undef end
assert(next(t) == nil)
prog, g, t = nil
do -- shrink stack
local m1, m2 = 0, collectgarbage"count" * 1024
while m1 ~= m2 do -- repeat until stable
collectgarbage()
m1 = m2
m2 = collectgarbage"count" * 1024
end
end
-- testing errors
a = T.testC([[
loadstring 2 name t; pcall 0 1 0;
pushvalue 3; insert -2; pcall 1 1 0;
pcall 0 0 0;
return 1
]], "XX=150", function (a) assert(a==nil); return 3 end)
assert(type(a) == 'string' and XX == 150)
_G.XX = nil
local function check3(p, ...)
local arg = {...}
assert(#arg == 3)
assert(string.find(arg[3], p))
end
check3(":1:", T.testC("loadstring 2 name t; return *", "x="))
check3("%.", T.testC("loadfile 2; return *", "."))
check3("xxxx", T.testC("loadfile 2; return *", "xxxx"))
-- test errors in non protected threads
local function checkerrnopro (code, msg)
local th = coroutine.create(function () end) -- create new thread
local stt, err = pcall(T.testC, th, code) -- run code there
assert(not stt and string.find(err, msg))
end
do
print("testing load of binaries in fixed buffers")
local source = {}
local N = 1000
-- create a somewhat "large" source
for i = 1, N do source[i] = "X = X + 1; " end
-- add a long string to the source
source[#source + 1] = string.format("Y = '%s'", string.rep("a", N));
source = table.concat(source)
-- give chunk an explicit name to avoid using source as name
source = load(source, "name1")
-- dump without debug information
source = string.dump(source, true)
-- each "X=X+1" generates 4 opcodes with 4 bytes each, plus the string
assert(#source > N * 4 * 4 + N)
collectgarbage(); collectgarbage()
local m1 = collectgarbage"count" * 1024
-- load dump using fixed buffer
local code = T.testC([[
loadstring 2 name B;
return 1
]], source)
collectgarbage()
local m2 = collectgarbage"count" * 1024
-- load used fewer than 400 bytes. Code alone has more than 3*N bytes,
-- and string literal has N bytes. Both were not loaded.
assert(m2 > m1 and m2 - m1 < 400)
X = 0; code(); assert(X == N and Y == string.rep("a", N))
X = nil; Y = nil
-- testing debug info in fixed buffers
source = {"X = 0"}
for i = 2, 300 do source[i] = "X = X + 1" end
source[#source + 1] = "X = X + {}" -- error in last line
source = table.concat(source, "\n")
source = load(source, "name1")
source = string.dump(source)
-- load dump using fixed buffer
local code = T.testC([[
loadstring 2 name B;
return 1
]], source)
checkerr(":301:", code) -- correct line information
end
if not _soft then
collectgarbage("stop") -- avoid __gc with full stack
checkerrnopro("pushnum 3; call 0 0", "attempt to call")
print"testing stack overflow in unprotected thread"
function F () F() end
checkerrnopro("getglobal 'F'; call 0 0;", "stack overflow")
F = nil
collectgarbage("restart")
end
print"+"
-- testing table access
do -- getp/setp
local a = {}
local a1 = T.testC("rawsetp 2 1; return 1", a, 20)
assert(a == a1)
assert(a[T.pushuserdata(1)] == 20)
local a1, res = T.testC("rawgetp -1 1; return 2", a)
assert(a == a1 and res == 20)
end
do -- using the table itself as index
local a = {}
a[a] = 10
local prog = "gettable -1; return *"
local res = {T.testC(prog, a)}
assert(#res == 2 and res[1] == prog and res[2] == 10)
local prog = "settable -2; return *"
local res = {T.testC(prog, a, 20)}
assert(a[a] == 20)
assert(#res == 1 and res[1] == prog)
-- raw
a[a] = 10
local prog = "rawget -1; return *"
local res = {T.testC(prog, a)}
assert(#res == 2 and res[1] == prog and res[2] == 10)
local prog = "rawset -2; return *"
local res = {T.testC(prog, a, 20)}
assert(a[a] == 20)
assert(#res == 1 and res[1] == prog)
-- using the table as the value to set
local prog = "rawset -1; return *"
local res = {T.testC(prog, 30, a)}
assert(a[30] == a)
assert(#res == 1 and res[1] == prog)
local prog = "settable -1; return *"
local res = {T.testC(prog, 40, a)}
assert(a[40] == a)
assert(#res == 1 and res[1] == prog)
local prog = "rawseti -1 100; return *"
local res = {T.testC(prog, a)}
assert(a[100] == a)
assert(#res == 1 and res[1] == prog)
local prog = "seti -1 200; return *"
local res = {T.testC(prog, a)}
assert(a[200] == a)
assert(#res == 1 and res[1] == prog)
end
a = {x=0, y=12}
x, y = T.testC("gettable 2; pushvalue 4; gettable 2; return 2",
a, 3, "y", 4, "x")
assert(x == 0 and y == 12)
T.testC("settable -5", a, 3, 4, "x", 15)
assert(a.x == 15)
a[a] = print
x = T.testC("gettable 2; return 1", a) -- table and key are the same object!
assert(x == print)
T.testC("settable 2", a, "x") -- table and key are the same object!
assert(a[a] == "x")
b = setmetatable({p = a}, {})
getmetatable(b).__index = function (t, i) return t.p[i] end
local k, x = T.testC("gettable 3, return 2", 4, b, 20, 35, "x")
assert(x == 15 and k == 35)
k = T.testC("getfield 2 y, return 1", b)
assert(k == 12)
getmetatable(b).__index = function (t, i) return a[i] end
getmetatable(b).__newindex = function (t, i,v ) a[i] = v end
y = T.testC("insert 2; gettable -5; return 1", 2, 3, 4, "y", b)
assert(y == 12)
k = T.testC("settable -5, return 1", b, 3, 4, "x", 16)
assert(a.x == 16 and k == 4)
a[b] = 'xuxu'
y = T.testC("gettable 2, return 1", b)
assert(y == 'xuxu')
T.testC("settable 2", b, 19)
assert(a[b] == 19)
--
do -- testing getfield/setfield with long keys
local t = {_012345678901234567890123456789012345678901234567890123456789 = 32}
local a = T.testC([[
getfield 2 _012345678901234567890123456789012345678901234567890123456789
return 1
]], t)
assert(a == 32)
local a = T.testC([[
pushnum 33
setglobal _012345678901234567890123456789012345678901234567890123456789
]])
assert(_012345678901234567890123456789012345678901234567890123456789 == 33)
_012345678901234567890123456789012345678901234567890123456789 = nil
end
-- testing next
a = {}
t = pack(T.testC("next; return *", a, nil))
tcheck(t, {n=1,a})
a = {a=3}
t = pack(T.testC("next; return *", a, nil))
tcheck(t, {n=3,a,'a',3})
t = pack(T.testC("next; pop 1; next; return *", a, nil))
tcheck(t, {n=1,a})
-- testing upvalues
do
local A = T.testC[[ pushnum 10; pushnum 20; pushcclosure 2; return 1]]
t, b, c = A([[pushvalue U0; pushvalue U1; pushvalue U2; return 3]])
assert(b == 10 and c == 20 and type(t) == 'table')
a, b = A([[tostring U3; tonumber U4; return 2]])
assert(a == nil and b == 0)
A([[pushnum 100; pushnum 200; replace U2; replace U1]])
b, c = A([[pushvalue U1; pushvalue U2; return 2]])
assert(b == 100 and c == 200)
A([[replace U2; replace U1]], {x=1}, {x=2})
b, c = A([[pushvalue U1; pushvalue U2; return 2]])
assert(b.x == 1 and c.x == 2)
T.checkmemory()
end
-- testing absent upvalues from C-function pointers
assert(T.testC[[isnull U1; return 1]] == true)
assert(T.testC[[isnull U100; return 1]] == true)
assert(T.testC[[pushvalue U1; return 1]] == nil)
local f = T.testC[[ pushnum 10; pushnum 20; pushcclosure 2; return 1]]
assert(T.upvalue(f, 1) == 10 and
T.upvalue(f, 2) == 20 and
T.upvalue(f, 3) == nil)
T.upvalue(f, 2, "xuxu")
assert(T.upvalue(f, 2) == "xuxu")
-- large closures
do
local A = "checkstack 300 msg;" ..
string.rep("pushnum 10;", 255) ..
"pushcclosure 255; return 1"
A = T.testC(A)
for i=1,255 do
assert(A(("pushvalue U%d; return 1"):format(i)) == 10)
end
assert(A("isnull U256; return 1"))
assert(not A("isnil U256; return 1"))
end
-- testing get/setuservalue
-- bug in 5.1.2
checkerr("got number", debug.setuservalue, 3, {})
checkerr("got nil", debug.setuservalue, nil, {})
checkerr("got light userdata", debug.setuservalue, T.pushuserdata(1), {})
-- testing multiple user values
local b = T.newuserdata(0, 10)
for i = 1, 10 do
local v, p = debug.getuservalue(b, i)
assert(v == nil and p)
end
do -- indices out of range
local v, p = debug.getuservalue(b, -2)
assert(v == nil and not p)
local v, p = debug.getuservalue(b, 11)
assert(v == nil and not p)
end
local t = {true, false, 4.56, print, {}, b, "XYZ"}
for k, v in ipairs(t) do
debug.setuservalue(b, v, k)
end
for k, v in ipairs(t) do
local v1, p = debug.getuservalue(b, k)
assert(v1 == v and p)
end
assert(not debug.getuservalue(4))
debug.setuservalue(b, function () return 10 end, 10)
collectgarbage() -- function should not be collected
assert(debug.getuservalue(b, 10)() == 10)
debug.setuservalue(b, 134)
collectgarbage() -- number should not be a problem for collector
assert(debug.getuservalue(b) == 134)
-- test barrier for uservalues
do
local oldmode = collectgarbage("incremental")
T.gcstate("enteratomic")
assert(T.gccolor(b) == "black")
debug.setuservalue(b, {x = 100})
T.gcstate("pause") -- complete collection
assert(debug.getuservalue(b).x == 100) -- uvalue should be there
collectgarbage(oldmode)
end
-- long chain of userdata
for i = 1, 1000 do
local bb = T.newuserdata(0, 1)
debug.setuservalue(bb, b)
b = bb
end
collectgarbage() -- nothing should not be collected
for i = 1, 1000 do
b = debug.getuservalue(b)
end
assert(debug.getuservalue(b).x == 100)
b = nil
-- testing locks (refs)
-- reuse of references
local i = T.ref{}
T.unref(i)
assert(T.ref{} == i)
local Arr = {}
local Lim = 100
for i=1,Lim do -- lock many objects
Arr[i] = T.ref({})
end
assert(T.ref(nil) == -1 and T.getref(-1) == nil)
T.unref(-1); T.unref(-1)
for i=1,Lim do -- unlock all them
T.unref(Arr[i])
end
local function printlocks ()
local f = T.makeCfunc("gettable R; return 1")
local n = f("n")
print("n", n)
for i=0,n do
print(i, f(i))
end
end
for i=1,Lim do -- lock many objects
Arr[i] = T.ref({})
end
for i=1,Lim,2 do -- unlock half of them
T.unref(Arr[i])
end
assert(type(T.getref(Arr[2])) == 'table')
assert(T.getref(-1) == nil)
a = T.ref({})
collectgarbage()
assert(type(T.getref(a)) == 'table')
-- colect in cl the `val' of all collected userdata
local tt = {}
local cl = {n=0}
A = nil; B = nil
local F
F = function (x)
local udval = T.udataval(x)
table.insert(cl, udval)
local d = T.newuserdata(100) -- create garbage
d = nil
assert(debug.getmetatable(x).__gc == F)
assert(load("table.insert({}, {})"))() -- create more garbage
assert(not collectgarbage()) -- GC during GC (no op)
local dummy = {} -- create more garbage during GC
if A ~= nil then
assert(type(A) == "userdata")
assert(T.udataval(A) == B)
debug.getmetatable(A) -- just access it
end
A = x -- resurrect userdata
B = udval
return 1,2,3
end
tt.__gc = F
-- test whether udate collection frees memory in the right time
do
collectgarbage();
collectgarbage();
local x = collectgarbage("count");
local a = T.newuserdata(5001)
assert(T.testC("objsize 2; return 1", a) == 5001)
assert(collectgarbage("count") >= x+4)
a = nil
collectgarbage();
assert(collectgarbage("count") <= x+1)
-- udata without finalizer
x = collectgarbage("count")
collectgarbage("stop")
for i=1,1000 do T.newuserdata(0) end
assert(collectgarbage("count") > x+10)
collectgarbage()
assert(collectgarbage("count") <= x+1)
-- udata with finalizer
collectgarbage()
x = collectgarbage("count")
collectgarbage("stop")
a = {__gc = function () end}
for i=1,1000 do debug.setmetatable(T.newuserdata(0), a) end
assert(collectgarbage("count") >= x+10)
collectgarbage() -- this collection only calls TM, without freeing memory
assert(collectgarbage("count") >= x+10)
collectgarbage() -- now frees memory
assert(collectgarbage("count") <= x+1)
collectgarbage("restart")
end
collectgarbage("stop")
-- create 3 userdatas with tag `tt'
a = T.newuserdata(0); debug.setmetatable(a, tt); local na = T.udataval(a)
b = T.newuserdata(0); debug.setmetatable(b, tt); local nb = T.udataval(b)
c = T.newuserdata(0); debug.setmetatable(c, tt); local nc = T.udataval(c)
-- create userdata without meta table
x = T.newuserdata(4)
y = T.newuserdata(0)
checkerr("FILE%* expected, got userdata", io.input, a)
checkerr("FILE%* expected, got userdata", io.input, x)
assert(debug.getmetatable(x) == nil and debug.getmetatable(y) == nil)
-- Test references in an arbitrary table
local reftable = {}
local d = T.ref(a, reftable);
local e = T.ref(b, reftable);
local f = T.ref(c, reftable);
t = {T.getref(d, reftable), T.getref(e, reftable), T.getref(f, reftable)}
assert(t[1] == a and t[2] == b and t[3] == c)
t=nil; a=nil; c=nil;
T.unref(e, reftable); T.unref(f, reftable)
collectgarbage()
-- check that unref objects have been collected
assert(#cl == 1 and cl[1] == nc)
x = T.getref(d, reftable)
assert(type(x) == 'userdata' and debug.getmetatable(x) == tt)
x =nil
tt.b = b -- create cycle
tt=nil -- frees tt for GC
A = nil
b = nil
T.unref(d, reftable);
local n5 = T.newuserdata(0)
debug.setmetatable(n5, {__gc=F})
n5 = T.udataval(n5)
collectgarbage()
assert(#cl == 4)
-- check order of collection
assert(cl[2] == n5 and cl[3] == nb and cl[4] == na)
-- reuse a reference in 'reftable'
T.unref(T.ref(23, reftable), reftable)
do -- check reftable
local count = 0
local i = 1
while reftable[i] ~= 0 do
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