Fixes this test failure:
Xamarin.Registrar.MT4161 : Unexpected error/warning with --registrar:static:
error MT0000: Unexpected error - Please file a bug report at http://bugzilla.xamarin.com
* [mtouch] Remove most static state and put it on an instance.
Remove most static state, and put it on an instance (of Application) instead.
Soon we'll build multiple apps (app extensions) in the same process, and we
need to make sure we're not inadvertedly (and incorrectly) sharing state
between apps, so remove as much static state as possible to avoid any
problems.
* [mtouch] Rename GetIsUsingClang -> IsUsingClang.
Use metadata tokens instead of strings to find types and methods.
This makes the code to find methods more compact (a lot less strings in the
executable, and additionally in most cases a compact representation (32-bit
integer) of the corresponding metadata token and additional information can be
used, which results in less executable code (fewer parameters to methods,
etc)), resulting in smaller executables.
Size savings are around 200kb for dont link apps, and 20-60kb for linked apps
(this obviously varies a lot depending on how much has to registered by the
registrar).
| | Before | After | Diff |
|----------------|--------------:|--------------:|------------------:|
| dontlink/32bit | 102.810.144 | 102.609.456 | -200.688 = -0,20% |
| dontlink/64bit | 107.420.576 | 107.221.792 | -198.784 = -0,19% |
| linksdk/32bit | 40.957.296 | 40.936.864 | -20.432 = -0,05% |
| linksdk/64bit | 43.113.136 | 43.093.936 | -19.200 = -0,04% |
| linkall/32bit | 38.410.032 | 38.348.288 | -61.744 = -0,16% |
| linkall/64bit | 40.315.200 | 40.267.344 | -47.856 = -0,12% |
Additionally I've removed the `lazy_map` dictionary, which we populated at
startup and was used to map between Class instances and the corresponding
managed type's FullName, and instead iterate over a native array of Class ->
metadata token mappings whenever we need to look up the managed type for a
certain Class instance.
This is slightly slower for each type we need to look up (for a non-linked app
there might be a 2000-3000 entries in the native array, which would be
iterated instead of using a hashtable lookup), but it's only done once per
type and there's a significant startup memory improvement.
For a non-linked test app I get the following using the Xamarin profiler:
| | Before | After | Diff |
|-------------------|--------:|--------:|----------------:|
| Memory allocated | 2,8 MB | 2,4 MB | -0,4 MB = -14 % |
| Objects allocated | 43678 | 38463 | -5215 = -12 % |
| Private bytes | 26,6 MB | 24,4 MB | -2,2 MB = -8,3% |
| Working set | 26,6 MB | 24,4 MB | -2,2 MB = -8,3% |
* [mtouch] Add missing HasParameters check inside linker and static registrar
Without the checks new, empty collections can be allocated and their
whole and only purpose will be to iterate up to 0 (nop).
The checks saves a small amount of memory (collections) and time.
* [registrar] Fix method comparison when they have no parameters
Managed exception marshaling interferes with the debugger, because it adds
exception handlers to executing code, which makes the Mono runtime think an
exception is handled when logically it's not (although technically it is).
The consequence is that the IDEs will only be notified when we re-throw the
exception after catching it, making it impossible for the IDEs to stop when
the exception is thrown (they will instead stop when we re-throw the
exception).
So disable managed exception marshaling (unless the user changed the default
behavior) when a debugger is attached.
This is the same behavior as Xamarin.Android.
https://bugzilla.xamarin.com/show_bug.cgi?id=45116
Duration before: 1,60s
Duration after: 1,54s
Difference: -0,06s = -3,8%
Memory usage hardly changed (-21 kb of 540 MB), but the number of method calls
shrunk significantly.
Method calls before: 86.720.379
Method calls after: 74.390.061
Difference: -12.330.318 = -14,2%
The call to `GetSystemVoidType` was #2 on the list of method calls (whens
sorted by 'self'), called 1072 times taking 1429 ms each time. After this
change it's only called once (and obviously pushed way down the list).
* [tests] Remove Classic SDK tests.
* Remove XI/Classic support.
This also means we can remove support for the legacy registrars.
* [monotouch-test] Remove legacy registrar tests.
* [tests/mtouch] Remove Classic tests (and legacy registrar logic).
* [tests/scripted] Fix tests to reference Xamarin.iOS.dll.
* Bump [watch-]mono to master to get fix for #43658.
https://bugzilla.xamarin.com/show_bug.cgi?id=43658
* [mtouch/mmp] Fix build after breaking cecil update in mono.
Also use mono's cecil instead of our own cecil submodule for mtouch.
* Bump [watch-]mono to get compilation fixes after cecil bump in mono.
* Remove cecil submodule, we only use the one in mono now.
This is only applicable to tvOS 10 (i.e. the xcode8 branch),
but applying the patch already helps avoiding merge failures
for other fixes in the same area.
Category methods are exposed like extension methods, and the first parameter
specifies the class, which means we need to skip the first type when generating
the ObjC signature.
https://bugzilla.xamarin.com/show_bug.cgi?id=42489
There can be circular dependencies between Objective-C classes,
so make sure we don't fail compilation when that occurs by
forward declaring any Objective-C classes/protocols.
The test case in question does not contain a circular dependency,
but the same issue occurs due to types not being generated in the
correct order (a correct order could be constructed for the test
case, but there's no general solution since circular dependencies
can exist).
https://bugzilla.xamarin.com/show_bug.cgi?id=42454
Category methods are exposed like extension methods, and the first parameter
specifies the class, which means we need to skip the first type when generating
the ObjC signature.
https://bugzilla.xamarin.com/show_bug.cgi?id=42489
There can be circular dependencies between Objective-C classes,
so make sure we don't fail compilation when that occurs by
forward declaring any Objective-C classes/protocols.
The test case in question does not contain a circular dependency,
but the same issue occurs due to types not being generated in the
correct order (a correct order could be constructed for the test
case, but there's no general solution since circular dependencies
can exist).
https://bugzilla.xamarin.com/show_bug.cgi?id=42454
Fixes NSCharacterSetTest.NSMutableCharacterSet_TestStaticSets when
running with the P/Invoke wrapper (for exceptions) enabled (i.e.
watchOS), since otherwise the wrapper would truncate char parameters
to byte.
There's a clang bug [2] where if a selector is marked as unavailable,
it's marked as unavailable for every class, not just the class where
the unavailable selector is.
This means that we can't do `[super initWithCoder:x]` anywhere,
because `initWithCoder:` is marked as unavailable for UIActivityViewController.
So instead rewrite the call to super to call objc_msgSendSuper
directly, circumventing clang's broken availability checks.
[1] https://bugzilla.xamarin.com/show_bug.cgi?id=41319
[2] https://llvm.org/bugs/show_bug.cgi?id=28058
Sebastien Pouliot
Rolf Bjarne Kvinge
Chris Hamons
Sebastien Pouliot