blob: 7f778307a17d162ed966c9e04e81efb1bf1854fa (
plain)
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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
(* TEST
modules="opt.ml barrier.ml hist.ml shared.ml run.ml outcome.ml"
* not-bsd
** not-windows
*** bytecode
** native
*)
(* Memory model: test the _publish idiom *)
module O = Opt.Make(struct let pgm = "forbidden"end)
module Config = O.Config
let verbose = Config.verbose
module OK = Outcome.OK
module NO = Outcome.NO
(* Types of shared memory locations *)
module IntRef = struct
let null = ref (-1)
type t = int ref
let empty _ = ref 0
let reinit r = r := 0
end
module IntRefRef = struct
type t = int ref ref
let empty _ = ref (IntRef.null)
let reinit r = r := IntRef.null
end
module OutPointer = struct
type t = bool
let compare = Bool.compare
let pp = function
| true -> "null"
| false -> "p"
end
(* Publication tests *)
module Publish = struct
(* Publication of int ref: the initial value of published
* pointer must be the one reader gets by derreferencing pointer:
* T0 | T1
* ------------+-------------
* q := ref 1 | let p = !q in
* | let v = !p in
* | ..
* If p is the fresh reference allocated by T0, then v must be 1.
*)
module IntRef = struct
module O0 = OutPointer
module O1 = Outcome.Int
module Key =
Outcome.Make(O0)(O1)
(struct
let name = "Publish+intref"
let tag0 = "q"
let tag1 = "r0"
let ok p r0 = not p && r0 <> 1
end)(NO)
module Env = Shared.One(IntRefRef)
(* publish *)
type out0 = unit
let code0 rr = rr := ref 1
(* Dereference twice *)
type out1 = bool * int
let code1 rr =
let r = !rr in
let v = !r in
r == IntRef.null,v
let out2key _ () (p,v) = Key.make p v
end
(* Publication of string reference, with subsequent updates.
* Notice that if publication is not properly protected,
* the test may crash by attempting to print junk *)
module String = struct
let null = "*null*"
module StringRef = struct
type t = string ref
let empty _ = ref null
let reinit r = r := null
end
let sz = 8
let updates = List.init sz (Printf.sprintf "%d")
module StringSet = Set.Make(String)
let valid =
let set = StringSet.of_list (null::updates) in
fun s -> StringSet.mem s set
module Key = struct
type t = string
let compare = String.compare
let ok s = not (valid s)
let allowed = false
let name = "Publish+string"
let pp chan s = Printf.fprintf chan "r0=%s" s
end
module Env = Shared.One(StringRef)
(* publish *)
type out0 = unit
let code0 q =
q := Printf.sprintf "%d" 0 ; (* publish *)
List.init (sz-1) (fun k -> k+1)
|>
List.iter
(fun v ->
q := Printf.sprintf "%d" v)
(* Dereference twice *)
type out1 = string
let code1 q = Domain.cpu_relax () ; !q
let out2key _ () v = v
end
end
(* One _allowed_ publication tests:
array index is published, not a reference *)
module MPaddr = struct
module Key =
Outcome.Make(Outcome.Int)(Outcome.Int)
(struct
let name = "MP+addr"
let tag0 = "idx"
let tag1 = "v"
let ok idx v = idx=1 && v=0
end)(OK)
module Env =
Shared.Make
(struct
type t = int array
let empty _ = Array.make 1 0
let reinit t = t.(0) <- 0
end)(IntRef)
type out0 = unit
let code0 (t,r) = (* publish int... *)
t.(0) <- 1 ;
r := 1
type out1 = int * int
let code1 (t,r) = (* Address dependency *)
let idx = !r in
let i = idx land 128 in
let v = t.(i) in
idx,v
let out2key _ () (idx,v) = Key.make idx v
end
module Forbid(C:Opt.Config) = struct
module Run = Run.Make(C)
module T1 = Run(Publish.IntRef)
let () = T1.zyva()
module T2 = Run(Publish.String)
let () = T2.zyva()
end
module Allow(C:Opt.Config) = struct
module Run = Run.Make(C)
module T1 = Run(MPaddr)
let () = T1.zyva()
end
let () =
if not verbose then begin
let module Twice(C:Opt.Config) =
struct
module _ = Forbid(C)
module _ =
Forbid
(struct
let verbose = C.verbose
let size = C.size / 10
let nruns = C.nruns * 10
let navail = C.navail
end)
end in
let module _ = Twice(Config) in ()
end else begin
let module _ = Forbid(Config) in
let module _ = Allow(Config) in
()
end
|