75708 2012-01-06 09:16:58 -0800 Concurrent instances of DRT on Windows can stomp on each other's databases etc. 2013-11-18 10:41:18 -0800 1 1 1 Unclassified WebKit Tools / Tests 528+ (Nightly build) PC Windows 7 RESOLVED FIXED InRadar, PlatformOnly P2 Normal --- 116729 38756 1 aroben webkit-unassigned bfulgham eric webkit-bug-importer oldest_to_newest 531100 0 aroben 2012-01-06 09:16:58 -0800 http://trac.webkit.org/changeset/57328 (bug 36899) changed DumpRenderTree to use a DUMPRENDERTREE_TEMP environment variable for storing databases, etc., so that concurrent instances of DRT won't stomp on each other. But this support was never added to Windows. We need to support this on Windows if we want to run multiple copies of DRT in parallel. 531101 1 webkit-bug-importer 2012-01-06 09:17:15 -0800 <rdar://problem/10654679> 893369 2 bfulgham 2013-05-24 10:55:16 -0700 It looks like WebKit on Windows uses either CSIDL_LOCAL_APPDATA or CSIDL_APPDATA (depending on context) to store database and URL cache information. 893490 3 bfulgham 2013-05-24 16:11:07 -0700 See Bug 116729 for an implementation that uses CFPreferences to store the current application's desired storage paths. This is the technique being used in the OS X port, which seems to work properly in a concurrent run environment. 896585 4 bfulgham 2013-06-03 13:21:25 -0700 For now, we will use new-run-webkit-tests hard-coding it to use a single worker. This will ensure we don't have any problems running concurrently. As a second step we will loosen this restriction once we've determined that the changes on Bug 116729 resolve the problem. 951682 5 bfulgham 2013-11-18 10:41:18 -0800 Fixed by use of separate environments per build process (Bug 116729).