1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
-- $Id: testes/cstack.lua $
-- See Copyright Notice in file all.lua
print"testing C-stack overflow detection"
-- Segmentation faults in these tests probably result from a C-stack
-- overflow. To avoid these errors, recompile Lua with a smaller
-- value for the constant 'LUAI_MAXCCALLS' or else ensure a larger
-- stack for the program.
local function checkerror (msg, f, ...)
local s, err = pcall(f, ...)
assert(not s and string.find(err, msg))
end
local count
local back = string.rep("\b", 8)
local function progress ()
count = count + 1
local n = string.format("%-8d", count)
io.stderr:write(back, n)
end
do print("testing simple recursion:")
count = 0
local function foo ()
progress()
foo()
end
checkerror("stack overflow", foo)
print("\tfinal count: ", count)
end
do print("testing stack overflow in message handling")
count = 0
local function loop (x, y, z)
progress()
return 1 + loop(x, y, z)
end
local res, msg = xpcall(loop, loop)
assert(msg == "error in error handling")
print("\tfinal count: ", count)
end
-- bug since 2.5 (C-stack overflow in recursion inside pattern matching)
do print("testing recursion inside pattern matching")
local function f (size)
local s = string.rep("a", size)
local p = string.rep(".?", size)
return string.match(s, p)
end
local m = f(80)
assert(#m == 80)
checkerror("too complex", f, 200000)
end
do print("testing stack-overflow in recursive 'gsub'")
count = 0
local function foo ()
progress()
string.gsub("a", ".", foo)
end
checkerror("stack overflow", foo)
print("\tfinal count: ", count)
print("testing stack-overflow in recursive 'gsub' with metatables")
count = 0
local t = setmetatable({}, {__index = foo})
foo = function ()
count = count + 1
progress(count)
string.gsub("a", ".", t)
end
checkerror("stack overflow", foo)
print("\tfinal count: ", count)
end
print'OK'
|
