[webkit-reviews] review requested: [Bug 64501] The JSC and V8 garbage collector can not properly remove an audio element created by JavaScript "new Audio". : [Attachment 100764] patch

[bugzilla-daemon at webkit.org]

Hwang <luxtella at company100.net> has asked  for review:
Bug 64501: The JSC and V8 garbage collector can not properly remove an audio
element created by JavaScript "new Audio".
https://bugs.webkit.org/show_bug.cgi?id=64501

Attachment 100764: patch
https://bugs.webkit.org/attachment.cgi?id=100764&action=review

------- Additional Comments from Hwang <luxtella at company100.net>
The audio element's life time should synchronize with document's life time.

V8 has following problem.
1. V8 GC removes an audio element at any time.

r45537 made JS GC collect an audio element created JavaScript only if
(!audio.paused()).
The condition causes 2 bugs.
1. LEAK : If playing the audio element and navigating another page,
audio.paused() returns "false".
2. GC sweeps the audio element at any time, not during playing. It makes web
developers confused because they can not play audio after GC.