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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
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-rw-r--r--js/src/jit-test/tests/basic/bug656261.js31
1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/bug656261.js b/js/src/jit-test/tests/basic/bug656261.js
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+++ b/js/src/jit-test/tests/basic/bug656261.js
@@ -0,0 +1,31 @@
+function build_getter(i) {
+ var x = [i];
+ return function f() { return x; }
+}
+
+function test()
+{
+ var N = internalConst("INCREMENTAL_MARK_STACK_BASE_CAPACITY") + 2;
+ var o = {};
+ var descriptor = { enumerable: true};
+ for (var i = 0; i != N; ++i) {
+ descriptor.get = build_getter(i);
+ Object.defineProperty(o, i, descriptor);
+ }
+
+ // At this point we have an object o with N getters. Each getter in turn
+ // is a closure storing an array. During the GC we push to the object
+ // marking stack all the getters found in an object after we mark it. As N
+ // exceeds the size of the object marking stack, this requires to run the
+ // dealyed scanning for some closures to mark the array objects stored in
+ // them.
+ //
+ // We run the GC twice to make sure that the background finalization
+ // finishes before we access the objects.
+ gc();
+ gc();
+ for (var i = 0; i != N; ++i)
+ assertEq(o[i][0], i);
+}
+
+test();