Also: general patch refresh
Upstream release notes:
Mono 3.10.0 is a bugfix release with a few features.
Highlights
Implemented System.IO.Compression.FileSystem.
Uri now implements the .NET 4.5 behavior, it can be reverted to
the old behavior in the same way by setting the System.Uri::s_IriParsing
static field to false.
Performance
Remove unnecessary locking from core metadata parsing functions.
Avoid cache thrashing of locals array when looping over enumerator.
Known Issues
The OSX packages have an invalid libgdiplus library that affects
users of System.Drawing that requires it to work.
This specially affects Xamarin.Mac users that fit the following criteria:
Uses Xamarin.Mac Classic (Unified is unaffected).
Uses the subsets of System.Drawing that use libgdiplus.dylib internally
- System.Drawing.RectangleF, PointF, Colors are unaffected
- System.Drawing.Bitmap, and font for example are affected
The symptom of the problem is your application failing with:
“System.TypeInitializationException: An exception was thrown by
the type initializer for
System.Drawing.GDIPlus —> System.Exception: GdiplusStartup”
Bug fixes
+++++++++
Runtime
Fix support for unaligned offsets in the store_membase_imm opcodes.
Fixes#23267.
Fix the lookup of nested types which have a namespace. Fixes#21653.
Increase some opcode sizes. Fixes#23026.
Always pass the imt arg to interface calls in gsharedvt methods.
Fixes#22624.
Store the epilog length in MonoArchEHJitInfo instead of encoding
it in jinfo->unwind_desc, since the latter can overflow for methods
with large epilogs. Fixes#22685.
Add a mono_thread_detach_if_exiting () public api function which
can be called by embedding code to detach the runtime if the code
is running from a pthread dtor. Fixes#21164.
Fix yet another native types problem. Fixes#22053.
Fix the leaking of mach ports introduced by
98bbf8512aec0fa01b4426583280f6d231d22187. Fixes#22068.
Add support for constrained calls with vtype return types in
gsharedvt code. Fixes#22109.
Fix the PLATFORM_GNU check so it works with gnueabi etc. as well.
Fixes#21520.
Don’t make runtime invoke signatures generic. Fixes#21973.
Allow v8..v15 in unwind info on arm64. Fixes part of #21615.
Fix Process.PrivateMemorySize64 etc. on ios. Fixes#21882.
Fix enum->int casts in gsharedvt code. Fixes#21893.
Don’t assert when loading a generic methodspec with 0 arity. Fixes#19097.
Avoid asserting when a cattr cannot be loaded. Fixes#21653.
Avoid making generic calls from gsharedvt methods normally, go
through the rgctx infrastructure instead. Fixes#21677.
Class Libraries
Fix Uri UserInfo parsing. Fixes 23246.
Update RequestMessage.RequestUri.AbsoluteUri after redirect. Fixes#22383.
Fixes XContainer attempt to create a XNode from a null value. Fixes#20151.
Changed XObject OnChanged and OnChanging to use Owner. When
XObject.Owner is not a XElement XObject.Parent returns null and the
owner would not be notified of changing and changed events. Fixes#18772.
Process XslLiteralElements with only child attributes as empty ones.
Fixes#14751.
‘finally’ protect ClientRuntimeChannel.Begin/EndProcess(). Fixes#22179.
WebClient.OpenWrite() must get the response on close. Fixes#10163.
Fix WebClient.UploadValuesTaskAsync(); Fixes#20359.
Improve System.Security.Claims. Fixes#22282.
Fixed serialization of XmlNode field with attribute XmlAnyElement.
Fixes#3211.
Handle String::Format with escaped closing }. Fixes#22114
Add a missing check to TypeBuilder.CreateType (). Fixes#22059.
Xml Serialization of Base class w/o a parameterless constructor.
Removed validation code that did not allowed serialization of
base classes without a parameterless constructor. Fixes#6913.
Fixed XmlSerializer to handle attribute XmlSchemePrivider.IsAny.
XmlSerializer no longer outputs a root element with class name when
the class has the attribute XmlSchemeProvider and IsAny is true.
Fixes#11916
Test that DeflateStream.Read does read an empty stream. Covers #19313.
Reseting all private key values to null is required because a new
import may not overwrite existing values. Fixes#18482.
Handle quoted filename value. Fixes#21960.
Dispose XmlReader using correct value. Fixes#21771.
C# Compiler
Don’t use `1 naming for compiler generated second level and deeper
nested types. Fixes#22893.
Extend missing type check to type lookups. Fixes#20933.
Fix copy and paste error in constraints checker. Fixes#22131.
Speed up nullable tokenizer. Fixes#20195.
Coalescing operator if the lhs of a null is a integer type that is
larger than the integer type on the rhs. Fixes#22054.
Check for duplicate destructors. Fixes#21983.
Switch statement with constant block at first label. Fixes#21805.
Decimal constants modulo folding. Fixes#21743.
Update codegen for boolean loads. Fixes#21685.
MSBuild
Workaround for issues with CreateItem task where metadata are
not generated due to up-to-data inputs. Fixes#23022.
Add KeepDuplicates etc. to 4.0 as internal. Fixes#20961.
------------------------------------------------------------------------
Mono 3.8.0 has 711 commits since the last release.
This is the work of 61 contributors since May 28. 58 bugs were fixed.
Highlights
Major performance and scalability improvements across the the whole runtime.
Finished the Windows 64 port.
Debugger wire protocol optimized for usb connections.
Debugger
Updated wire protocol better handles high latency connections such
as those found when doing USB debugging.
Client library now aggressively caches information and batches
requests. Under one test scenario single stepping packets
transmitted dropped from 2233 to only 16, with the latency going
from seconds to 20 milliseconds.
Performance
The JIT now better handles long remainders by powers of two,
generating significantly better code.
Over 10x faster code is generated for delegates that are only
invoked once. C# features such as async and LINQ produce a lot of
those delegates, so this improvement will impact everyone.
Improved alias analysis can now handle second order aliases and
eliminate null checks.
The runtime now has a concurrently readable hashtable that can
makes reflection heavy workloads significantly faster and more scalable.
Garbage Collection
Optimized one of the core data structures of the garbage collector;
should result in 5-10% reduction in collection times.
Bug fixes
+++++++++
Runtime
Fix the leaking of mach ports introduced by
98bbf8512aec0fa01b4426583280f6d231d22187. Fixes#22068
Fix Process.PrivateMemorySize64 etc. on ios. Fixes#21882
Fix enum->int casts in gsharedvt code. Fixes#21893
Avoid making generic calls from gsharedvt methods normally, go
through the rgctx infrastructure instead. Fixes#21677
Fix another native-types problem. Hopefully fixes#21670 and #21636
Use alias information to eliminate explicit null checks. Fixes#21645
Initialize fields in MonoField:GetFieldOffset () if needed.
Fixes part of #21604
Properly handle rethrow outside of catch blocks. Fixes#20412
Disable runtime unit tests on linux, because it cannot be linked
due to circular dependencies between libraries. Fixes#21520
When parsing a method header, ensure we pass any available generic
context. Fixes#21388
Added new mono_domain_set_config function; used to fix
ConfigurationErrorsException in #10468
Only apply the maverick stack size hack to the main thread. Fixes#10096
Don’t hardcode the temp dir to /tmp, use g_get_tmp_dir instead.
Fixes#20894
Explicit thread GC data around instead of relying on TLS storage.
Fixes#20360
Make WaitForPendingFinalizers () really wait for the finalizers
added by a previous GC. Fixes#20503
Fix the marshal7.cs test, longs can be aligned to 4 bytes on
32 bit linux, and the runtime no longer aligns structure sizes
to 8 bytes. Fixes#20788
Fix the popping of LMF frames during unwinding. Fixes#20616
Fix the marshalling of ByValTStr types which have a size specified.
Fixes#20674
Fix the decoding of MonoJitInfo. Fixes#16439
Make it possible to create views to magic zero size files such as
/dev/zero. Fixes#19460
Free static bound delegate wrappers of dynamic methods. Fixes#19058
Don’t perform double accounting of offset for named memory segments.
Fixes#20591
Avoid joining attached threads. Fixes#19343
Fix support for custom marshallers defined in other assemblies.
Fixes#20020
Fix a jit assertion on a class which contains an empty struct as
a static field. Fixes#20349
Applied patch from Kyle Edwards kyleedwardsny@gmail.com.
Fix isinf () check with clang. Fixes#20244
Fix constrained type unwrap for enum types. Fixes#18371
Class Libraries
Handle quoted filename value. Fixes#21960
Correctly handle partial chunk sizes. Fixes#20583
Tweak Dictionary initial capacity to be more conservative. Fixes#21375
Handle closed-over-null delegates created with IL when using
InvokeDynamic. Fixes#21196
Fix a race in a Task test. Fixes#20921
Contract the values array when decoding an array with a negative
number and a trailer that evals to zero. Fixes#20456
Fixes issue with expression columns and IsNull. Fixes#20925
Array qsort without head allocation. Fixes#20922
Enum::TryParse ignores leading whitespaces. Fixes#20870
Fix disposing of DelegatingHandler. Fixes#20818
Fix digest authentication (bug #18799)
Only recycle ServicePoints from the idle timer (fixes#19823)
Changed ConcurrentDictionary.Contains(KeyValuePair<TKey, TValue>)
to also compare value. Fixes#16990
Add System.ServiceModel.Security assembly. Fixes#20108
Removed NET_2_1 conditional blocks from FileInfo. Fixes#19862
C# Compiler
Update codegen for boolean loads. Fixes#21685
Effective base class can include inherited types. Fixes#21390
Handle duplicate resume point registration. Fixes#21387
Arguments can be empty when reporting missing params argument. Fixes#21215
Flow analysis of moved arguments. Fixes#20983
Run new initializer await checks only in async context. Fixes#20614
Parse numeric expressions using invariant culture. Fixes#20582
Reachability analysis should ignore local variables declarations.
Fixes#20603
Check for missing dependencies of container types. Fixes#20382
Resolve event expression when testing left side expression. Fixes#20493
Flow analysis of binary expressions not using logical operators.
Fixes#20515
MSBuild
Add 4.5.1 framework. Fixes#20827
Parsing conditions with property references. Fixes#20634
Implements property functions using constructor syntax. Fixes#12999
Mono Debugger
Avoid clearning event requests if they reference an assembly which
is unloaded. Instead, remove the assembly reference from the event
request so it stays active. Fixes#9924.
New in Mono 3.0.10
A hot-fix release.
Reverted parallel mkbundle.
Fixed duplicated debug symbol problem in the compiler.
New in Mono 3.0.9
Fix gtk+ copy & paste.
Fix debugger support for custom attributes.
Proper stack bounds calculation on windows.
Add partial generic methods to our C# compiler.
NaCL support for ARM.
Fix LLVM loading on OSX.
New in Mono 3.0.8
Multiple improvements to the BCL to reduce usage of non generic
collections and use faster string comparisons.
Optimize large object cloning and boxing.
Multiple changes to bring mono closer to full PCL compatibility.
Add System.WeakReference<T>
Sgen can now return memory to the system for
Many compiler fixes for async.
Improved FullAOT support for async.
NaCl build fixes and improvements.
WCF now has cookie support in .net 4.0.
Optimize Marshal.Read/Write methods to avoid a trip to unmanaged
when needed.
Optimize LINQ with arrays.
Multiple fixes to the sgen's concurrent collector.
New in Mono 3.0.7
Multiple fixes to the sgen's concurrent collector.
Performance improvements in primitive types parsing.
Add a configuration time option to disable remoting.
Optimize tls lookups on full-aot + arm.
Add a configuration option to disable remoting.
Multiple improvements and bug fixes in culture related code.
Runtime assembly mapping for PCL.
Fix Binder primitive conversion to make .net.
Optimize Activator.CreateInstance ().
Optimize icalls in FullAOT code.
Implement Volatile.Read/Write<T> and Interlocked.MemoryBarrier ().
Optimized unmanaged to managed string conversion.
New in Mono 3.0.6
This is another hotfix release. It reverses the visibility change
made to Mono.Runtime.GetDisplayName.
New in Mono 3.0.5
This is a hot-fix release. It fixes a crash in the runtime support
for generics, which could be triggered by Xamarin Studio. New in
Mono 3.0.4 Garbage Collector
Many changes went into our GC implementation. We added long links
support to our traditional Boehm collector. As for SGen, it is
finally a true concurrent GC, with cementing support. We also fixed
several bugs, such as #9928 pointer free deadlock problem and bugs
in mono_gc_weak_link_get. Async
Rewrite of async StreamReader/StreamWritter operations to not fail
on subsequent async call. Fixes#9761 ASP.NET
Updated encoding support.
Some minor bug fixes. Other improvements
New MONO_DISABLE_SHARED_AREA environment variable lets you turn of
the use of shared memory in Mono (used by performance counters and
optionally by the io-layer).
Updated EntityFramework version that ships with Mono.
Support for ConnectionLifetime parameter in SqlClient (contributed
by 7digital).
Fixed C# Evaluator Terse reader with loops
Don't report user operator error during probing user conversions.
Fixes#10170.
Add explicit interface GetType implementation to avoid object::GetType
become proxy. (C# compiler fix)
Implement use of __refvalue as an lvalue. Fixes#10034. Packaging
We no longer install a /usr/bin/pkg-config on OSX, to stop clashing
with Homebrew.
New in Mono 3.0.3
Mono garbage collectors now feature multiple dtrace probes for
users on MacOS and Solaris.
Many stability improvements and performance work on Mono's Async
support. Garbage Collector
Sgen now has a concurrent GC that can significantly reduce max
pauses. This is an experimental feature that is been continuously
developed. Click here for more details. Bug Fixes
#8401, #9247, #8903, #9087, #9225, #9186, #9118, #9137, #9133,
#9116, #1446, #2246, #6918, #8904, #8927, #2907, #8829, #8786 New
in Mono 3.0.2
We are now on a cadence to deliver new Mono features and updates
on a regular basis. A month after our last release we are now
bringing some 363 commits, with 3055 files changed, 171240
insertions(+), 179104 deletions(-) Major Features
'Reactive Extensions': Mono now bundles the open sourced Microsoft's
Reactive Extensions
F# 3.0: We have updated the bundled F# compiler on OSX to version
3.0 (tag 3.0.22 from the open source fsharp repository).
SGen Garbage Collector: new lazy sweep strategy in Mono's new GC
that reduces the GC times for major collections significantly. We
have also tuned and improved the collector.
System.Json: We reverted System.Json to Mono's version, as it was
lighter and tolerates more input than Microsoft's one. We ship
System.Json.Microsoft as well for users that want to use the
Microsoft stack.
Runtime: Many improvements to Mono, better x86 and ARM support
across the board.
NTLM: Large upgrade to our NTLM stack.
clang: Mono now builds with Clang.
monodoc: vast improvements to our documentation infrastructure.
Bug fixes in 3.0.2
#8566, #8565, #8549, #8646, #8592, #8561, #8559, #8557, #8553,
#8533, #8502, #8468, #8449, #8448, #8414, #8399, #8385, #8384,
#8383, #8366, #8334, #8320, #8312, #8285, #8283, #8263, #8232,
#8156, #8037, #7965, #6650, #5760, #4587, #3582, #3275, #2471 and
#2190
New in Mono 3.0 Major Highlights C# Compiler
Mono now has a complete C# 5.0 compiler with asynchronous programming
support.
Our C# compiler has now completed its migration from using
System.Reflection.Emit as its code generation backend to use the
IKVM.Reflection API. This functionality was previewed in Mono 2.10
and is now the default. With this functionality, developers can
use any mscorlib that they want (for example the MicroFramework
one, or a custom one) without having to build a custom compiler.
We were able to eliminate the multiple executables for the compiler,
and unify all the compilers into one as well as reducing our build
times significantly.
gmcs, dmcs and smcs are now merely aliases to call the mcs compiler
with the proper -sdk flag. Tool/Library Purpose Profile
New Backend 2.10 Backend gmcs C# Compiler 2.0
IKVM.Reflection System.Reflection 2.0 dmcs C# compiler
4.0 IVKM.Reflection System.Reflection 4.0 smcs C#
Compiler 2.1 (Silverlight, MonoTouch, MonoDroid)
IKVM.Reflection System.Reflection 2.0 mcs C# Compiler
Any profile, any mscorlib IKVM.Reflection IKVM.Reflection
csharp Interactive C# Shell/REPL 4.5 System.Reflection
4.5 System.Reflection 4.0 Mono.CSharp C# Compiler as a Service
2.0, 2.1 and 4.0. System.Reflection 4.0 System.Reflection
System.Reflection is still used as a backend for the compiler as
a service and the C# interactive shell. Evaluation can now Compile
Types
The Evaluator.Eval () API is no longer limited to expressions and
statements, you can now pass entire namespace, class, interface,
struct definitions as a string and have the result get compiled.
This extends to the csharp command:
csharp> class X { public int a; } csharp> var t = new X () { a =
1 }; csharp> print (t.a); 1 csharp>
Instance API
The compiler as a service exposed by the Mono.CSharp library is no
longer limited to be a global compiler, now you can instantiate
multiple scopes for the compiler, each having its own set of
localized types and global variables.
For example, the following sample assigns a string in one context
and an int in another one:
using System; using Mono.CSharp;
class MyWorld {
public Evaluator Evaluator;
public MyWorld (string [] args) {
var r = new Report (new ConsoleReportPrinter ());
var cmd = new CommandLineParser (r);
var settings = cmd.ParseArguments (args); if (settings
== null || r.Errors > 0)
Environment.Exit (1);
Evaluator = new Evaluator (settings, r); } }
class X {
static int Main (string [] args) {
var first = new MyWorld (args); var second = new
MyWorld (args);
first.Evaluator.Run ("var Demo = \"hello, world\";");
second.Evaluator.Run ("var Demo = 1;"); first.Evaluator.Run
("print (Demo);"); second.Evaluator.Run ("print
(Demo);"); return 0; } }
C# Interactive Shell
New convenience function print, can be used instead of Console.WriteLine
Additionally, the C# interactive shell will by default use a terse
syntax that does not require a semicolon at the end of an expression,
for example:
csharp> 1 + 2 3 csharp>
4.5 Profile
The 4.5 Profile is a strict superset of the 4.0 API and is now the
default profile.
Because 4.5 API is a strict superset of 4.0 API they both share
the same assembly version number, so we actually install the 4.5
library into the GAC.
Some of the changes in the 4.5 API family include:
New Async methods WinRT compatibility API Newly introduced
assemblies (System.Net.Http, System.Threading.Tasks.Dataflow)
New Microsoft Open Source Stacks
We now include the following assemblies as part of Mono from
Microsoft's ASP.NET WebStack:
System.Net.Http.Formatting.dll System.Web.Http.dll System.Web.Razor.dll
System.Web.WebPages.Deployment.dll System.Web.WebPages.Razor.dll
System.Web.WebPages.dll System.Web.Mvc.dll System.Json.dll
(Previously available in Mono, but now replaced with Microsoft's
implementation)
We also bundle the recently open sourced Entity Framework and
EntityFramework.dll
Garbage Collector
SGen now has a new task management system that allows it to easily
scale new GC-related tasks across multiple CPUs if available:
SGen on SMP systems is able to distribute more work across the
worker threads. Previously only the mark phase was distributed.
SGen is now able to perform parallel collection in the nursery.
SGen has been ported to Win32 SGen has been ported to the MIPS
platform Precise stack scanning has been improved considerably,
and it is now supported on x86 and ARM. On OSX, SGen now uses
Mach APIs directly to speedup some tasks in the garbage collector.
Runtime Optimizations
Implemented fast version of ThreadLocal<T> (it is now a low-level
intrinstic operation)
List<T> optimizations
Support for new attributes to force inlining.
Major change in Mono to support the full table of Unicode surrogate
characters. This code was written by Damien Diederen and David
Mitchell from Logos software.
Runtime supports deferred attaching to the process (when using
suspend=n,server=y the runtime collects metadata until a debugger
is attached).
Implement tail call optimizations on PowerPC for F# (Bug #664631)
New profiler that can be used with Intel's VTune Amplifier Profiler.
Support for System.Net.NetworkInformation.NetworkChanged events on
Linux.
New tool: crlupdate this is the Mono Certficate Revocation List
Downloader and Updater and can be used to download of new, or update
of existing, Certficate Revocation List (CRL) associated with the
certificates present in the user (default) or machine stores. The
CRL present in the stores are used to determine the validity of
unexpired, trusted X.509 certificates. ASP.NET
Bring the error page to the new millenium. CodeContracts
Alexander Chebaturkin has implemented initial version of static
Code Contract analyser as part of SoC 2011. Smaller Updates
Partial support for Portable Class Libraries (details)
Updated Unicode tables, fixes long-standing 480178 MacOS X
We continue to expand significantly our support for MacOS X and
iOS.
Mono can now be compiled by users as a 64-bit binary. Mono still
ships as a 32-bit binary, as most libraries that exist today for
Mono run only in 32 bits.
DriveInfo now returns correct information on OSX. Mono.Data.Sqlite
It is now possible to configure the threading model for SQLite
using the SetConfig method in the SQLiteConnection class.
Supports iOS crypto APIs. C5 Library
We have updated the venerable C5 library to the latest version.
Breaking Changes Since Mono 2.10
In order to be compatible with Microsoft .NET's behavior, exceptions
thrown in object finalizers now cause a full runtime abort. This
behavior was already present for thread pool threads, but hadn't
been enabled for the finalizer thread yet.
Generally, one should avoid exceptions in finalizers entirely. If
you must use them, catch them so that they do not terminate the
application. GDB
GDB support has been extended with a new gdb hook that is aware
of the SGenGC internals. Added pretty printers for more runtime
data structures like MonoVTable to the mono gdb mode.
MIPS port
The MIPS port is now complete, it can do a full bootstrap, and run
the runtime/corlib test suites. Soft Debugger
Single stepping is now implemented using breakpoints in most
cases, speeding it up considerably. Calls to
System.Diagnostics.Debugger:Log()/Break () are now routed to
the debugger using new UserLog/UserBreak event types. S390x
is now supported (Neale Ferguson). MIPS is now supported.
Added new methods to Mono.Debugger.Soft and the runtime to
decrease the amount of packets transmitted between the debugger
and the debuggee. This significantly improves performance over
high latency connections like USB. Many bug fixes.
Static Compiler (AOT)
Made changes to some AOT data structures to reduce their size,
especially when using generics. This reduces the size of an mscorlib
AOT image by about 1-2%.
Many changes to the class libraries allow more core Generics code
to run on systems that do not support JIT compilation.
Apply some openbsd changes from openbsd ports.
Check whenever g++ is installed, since libtool requires it
even if no c++ files will be compiled.
Set default for with_moonlight to fix "Moon Profile:" output.
Append -lgc to libmono_ldflags if using an external libgc
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