[Mono-dev] WeakReference problem
Hi, the generic WeakReferenceT for .NET 4.5 sometimes returns true from TryGetTarget even though the target has been collected (the out-value is correctly set to null). All my WeakReferences have been initialized with non-null values. Looking at the source at github I can imagine that there is a race between the handle.IsAllocated check and the handle.Target retrieval, but I'm no expert. Should I file a bug on that one? I'm not sure what the expected behavior is since MSDN documentation of that method isn't so great, but if the caller has to check the out-value against null anyways, then the return value becomes kinda pointless in my opinion. Regards, Tobias ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] WeakReference problem
Please provide a test case that shows this behavior On Wed, Jan 29, 2014 at 5:00 PM, Tobias Käs tobias.k...@gmx.de wrote: Hi, the generic WeakReferenceT for .NET 4.5 sometimes returns true from TryGetTarget even though the target has been collected (the out-value is correctly set to null). All my WeakReferences have been initialized with non-null values. Looking at the source at github I can imagine that there is a race between the handle.IsAllocated check and the handle.Target retrieval, but I'm no expert. Should I file a bug on that one? I'm not sure what the expected behavior is since MSDN documentation of that method isn't so great, but if the caller has to check the out-value against null anyways, then the return value becomes kinda pointless in my opinion. Regards, Tobias ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
[Mono-dev] Array.Copy endian issue?
Hello, I’m chasing a bug while parsing the machine.config XML file, and I’ve narrowed it down to Array.Copy performing the wrong copy. Here’s an example: before copy 'descript' after copy ' edcsirt' The buffer is altered after its copied. This seems to happen only on newer versions of linux (3.4.6) on an armv5tel device. When running linux 2.6 I don’t see this. Any thoughts on what might be causing this? Thanks! Bassam ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Array.Copy endian issue?
A little more details. If I remove the FastCopy call in Array.Copy I am unable to reproduce this. // if (FastCopy (sourceArray, sourceIndex, destinationArray, destinationIndex, length)) // return; Attached is a test case but it needs to be run on a ARM device with the same version of Linux. Happy to provide access to a box if needed. I’ll open a Xamarin bug too. Thanks! Bassam On Jan 29, 2014, at 3:53 PM, Bassam Tabbara bas...@symform.com wrote: Hello, I’m chasing a bug while parsing the machine.config XML file, and I’ve narrowed it down to Array.Copy performing the wrong copy. Here’s an example: before copy 'descript' after copy ' edcsirt' The buffer is altered after its copied. This seems to happen only on newer versions of linux (3.4.6) on an armv5tel device. When running linux 2.6 I don’t see this. Any thoughts on what might be causing this? Thanks! Bassam ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list Program.cs Description: Program.cs ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
