53218 2011-01-26 18:12:55 -0800 Add a test mode to WebKit2 that exercises reentrancy while waiting for reply to a synchronous message 2014-01-28 20:18:51 -0800 1 1 1 Unclassified WebKit WebKit2 528+ (Nightly build) PC Windows XP RESOLVED INVALID InRadar, PlatformOnly P2 Normal --- 1 aroben aroben andersca sam oldest_to_newest 340678 0 aroben 2011-01-26 18:12:55 -0800 As described in bug 51351 comment 4 and in bug 51352, we're going to make WebKit2 spin a run loop while waiting for a reply to all synchronous messages. This will provide many more opportunities for reentrancy into WebKit. To uncover issues this causes, we should add a test mode to WebKit2 that explicitly causes this reentrancy to happen. 340679 1 aroben 2011-01-26 18:14:08 -0800 One way to do this is: Add a message-only window inside WebKit2. Whenever we are about to spin a run loop while waiting for a reply to a synchronous message, post a custom window message to the message-only window. When the message-only window receives the message, make some call into WebKit (e.g., try to close a page, modify the DOM and trigger layout, etc.). 340680 2 aroben 2011-01-26 18:14:21 -0800 We could turn this mode on while running the regression tests, e.g. 340684 3 andersca 2011-01-26 18:16:19 -0800 <rdar://problem/8922495>