blob: d641a4ebc50bb92f56c365b5f4931efecf5be884 (
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
|
// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax
// This tests checks some possible wrong exception handling due to,
// for instance, the OSR loop peeling. If exception handlers are not updated
// correctly, when we run the second iteration of the outermost loop, which
// is the OSR optimised version, the try-catch will fail... which should not
// fail on a correct code.
function SingleLoop() {
for (var a = 0; a < 2; a++) {
try { throw 'The exception should have been caught.'; }
catch(e) {}
for (var b = 0; b < 1; b++) {
%OptimizeOsr();
%PrepareFunctionForOptimization(SingleLoop);
}
}
}
%PrepareFunctionForOptimization(SingleLoop);
// These function could also fail if the exception handlers are not updated at
// the right time: a JSStackCheck gets created for the print, just after the
// bytecode for the while LoopHeader. If the OSR phase did not exit properly
// the exception before visiting the bytecode for the print, it will fail
// because some IfSuccess gets created for nothing (the IfException will
// become dead code and removed).
function EmptyBody() {
try {; } catch(e) {; }
var a = 0;
while (1) {
%OptimizeOsr();
print("foo");
if (a == 1) break;
a++;
%PrepareFunctionForOptimization(EmptyBody);
}
}
%PrepareFunctionForOptimization(EmptyBody);
function NestedLoops() {
for (var a = 0; a < 2; a++) {
try {; } catch(e) {; }
%OptimizeOsr();
var b = 0;
while (1) {
print("bar");
if (b == 1) break;
b++;
}
%PrepareFunctionForOptimization(NestedLoops);
}
}
%PrepareFunctionForOptimization(NestedLoops);
SingleLoop();
EmptyBody();
NestedLoops();
|
