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Issue 19805003: Restore test and behavior prior to deferred stack trace formatting. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: comment addressed Created 7 years, 5 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
4 // met:
5 //
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28 // Flags: --expose-gc --allow-natives-syntax
29
30 var fired = [];
31 for (var i = 0; i < 100; i++) fired[i] = false;
32
33 function getter_function(i) {
34 return %MarkOneShotGetter( function() { fired[i] = true; } );
35 }
36
37 // Error objects that die young.
38 for (var i = 0; i < 100; i++) {
39 var error = new Error();
40 // Replace the getter to observe whether it has been fired,
41 // and disguise it as original getter.
42 var getter = getter_function(i);
43 error.__defineGetter__("stack", getter);
44
45 error = undefined;
46 }
47
48 gc();
49 for (var i = 0; i < 100; i++) {
50 assertFalse(fired[i]);
51 }
52
53 // Error objects that are kept alive.
54 var array = [];
55 for (var i = 0; i < 100; i++) {
56 var error = new Error();
57 var getter = getter_function(i);
58 // Replace the getter to observe whether it has been fired,
59 // and disguise it as original getter.
60 error.__defineGetter__("stack", getter);
61
62 array.push(error);
63 error = undefined;
64 }
65
66 gc();
67 // We don't expect all stack traces to be formatted after only one GC.
68 assertTrue(fired[0]);
69
70 for (var i = 0; i < 10; i++) gc();
71 for (var i = 0; i < 100; i++) assertTrue(fired[i]);
72
73 // Error objects with custom stack getter.
74 var custom_error = new Error();
75 var custom_getter_fired = false;
76 custom_error.__defineGetter__("stack",
77 function() { custom_getter_fired = true; });
78 gc();
79 assertFalse(custom_getter_fired);
80
81 // Check that formatting caused by GC is not somehow observable.
82 var error;
83
84 var obj = { foo: function foo() { throw new Error(); } };
85
86 try {
87 obj.foo();
88 } catch (e) {
89 delete obj.foo;
90 Object.defineProperty(obj, 'foo', {
91 get: function() { assertUnreachable(); }
92 });
93 error = e;
94 }
95
96 gc();
97
98 Object.defineProperty(Array.prototype, '0', {
99 get: function() { assertUnreachable(); }
100 });
101
102 try {
103 throw new Error();
104 } catch (e) {
105 error = e;
106 }
107
108 gc();
109
110 String.prototype.indexOf = function() { assertUnreachable(); };
111 String.prototype.lastIndexOf = function() { assertUnreachable(); };
112 var obj = { method: function() { throw Error(); } };
113 try {
114 obj.method();
115 } catch (e) {
116 error = e;
117 }
118
119 gc();
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