Our type map has two sections: first come all the wrapper types, then all the
custom types. This means we need to sort these two sections separately, since
code elsewhere depends on this split in order to determine if a type is a
custom type or not.
We also need a minor modification in the array of skipped types, since it
contained indexes into the type map, which won't be valid after is has been
sorted. Instead store a type reference for the actual type in the array, and
use that to search the type map for the corresponding Class. This is a little
bit slower, but the results are cached in a dictionary, so it'll only happen
once for each type.
The performance is slightly slower when the type map has very few entries, but
that is repaid many times over when the number of entries go up.
Numbers
=======
Test case: 004283d7b6
iPad Air 2
----------
| Configuration | Before | After | Improvement |
| ------------------- | ------ | ------ | ------------: |
| Release (link all) | 477 ms | 481 ms | -4 ms (-0,8%) |
| Release (dont link) | 738 ms | 656 ms | 82 ms (11%) |
iPhone X
--------
| Configuration | Before | After | Improvement |
| ------------------- | ------ | ------ | ----------: |
| Release (link all) | 98 ms | 99 ms | -1 ms (-1%) |
| Release (dont link) | 197 ms | 153 ms | 44 ms (22%) |
When linking all assemblies, the type map has 24 entries, and when not linking
at all it has 2993 entries.
This is part 1 of multiple fixes for #4936.
* [runtime] Throw a managed exception instead of trying to call a null function pointer if the runtime tries to call a function that has been linked away.
* [tests] Add new file for Xamarin.Mac tests.
* Direct people to file issues in github.
* Add support for delegates as return values in protocol members. Fixes#4102.
This required a few changes:
* The generator now emits the DelegateProxy attribute for property getters in
protocol interfaces.
* The generator now emits the DelegateProxy attribute in ProtocolMember
attributes (and the ProtocolMember attribute has been extended with
additional properties for this purpose).
* The generator now emits the BlockProxy attribute for the parameter in
property setters.
* The generator now emits the BlockProxy attribute in ProtocolMember
attributes for property setters.
* The static registrar now emits the metadata token for the
DelegateProxy.DelegateType property into the generated code so that the
DelegateProxy attribute itself isn't needed at runtime. This is required
when the dynamic registrar has been optimized away.
Fixes https://github.com/xamarin/xamarin-macios/issues/4102.
* [tests] Update MX4105 test to expect new warnings.
* Convert it into a MM8027/MT8027 error (with documentation).
* Add information about the selector and managed method that triggered the error.
Now the problem reported in issue #4254 shows up as:
> ObjCRuntime.RuntimeException: Failed to marshal the Objective-C object 0x7f8080412810 (type: UIView). Could not find an existing managed instance for this object, nor was it possible to create a new managed instance (because the type 'UIKit.UIView&' does not have a constructor that takes one IntPtr argument).
> Additional information:
> Selector: popoverController:willRepositionPopoverToRect:inView:
> Method: UIKit.UIPopoverController+_UIPopoverControllerDelegate.WillReposition(UIKit.UIPopoverController, CoreGraphics.CGRect ByRef, UIKit.UIView ByRef)
instead of just:
> ObjCRuntime.RuntimeException: Failed to marshal the Objective-C object 0x7f8080412810 (type: UIView). Could not find an existing managed instance for this object, nor was it possible to create a new managed instance (because the type 'UIKit.UIView&' does not have a constructor that takes one IntPtr argument).
which makes it much easier to understand, track down, and fix/work around,
both for customers and ourselves.
This makes exception marshaling work with Xamarin.Mac apps that use the system
mono (such as Visual Studio for Mac, and assuming at least a v5.12 system
mono).
https://github.com/xamarin/xamarin-macios/issues/4271
* [runtime] Don't lock while calling selectors that can up calling managed code. Fixes#3943.
Instead of locking the framework peer lock while we call release on dying
object, we just lock and then immediately unlock again before calling release.
This enforces an execution order that still strong enough to not run into race
conditions, while at the same time not running into deadlocks.
Fixes https://github.com/xamarin/xamarin-macios/issues/3943.
* [static registrar] Optimize creation of delegates for blocks.
Optimize creation of delegates for blocks so that it doesn't require the
dynamic registrar.
This is done by getting the metadata token for the Create method that creates
the delegate, and embed that metadata token in the generated code from the
static registrar.
Also add tests, since this scenario was not covered by tests already.
* [mmptest] Fix test after recent changes.
* [test-libraries] Avoid duplicate symbols.
* [tests] Update according to changes.
Generate table of protocols and their corresponding wrapper type in the static
registrar, so that we don't have to look for this information using the
dynamic registrar at runtime.
* [linker] Optimize calls to BlockLiteral.SetupBlock to inject the block signature.
Optimize calls to BlockLiteral.SetupBlock[Unsafe] to calculate the block
signature at build time, and inject it into the call site.
This makes block invocations 10-15x faster (I've added tests that asserts at
least an 8x increase).
It's also required in order to be able to remove the dynamic registrar code in
the future (since calculating the block signature at runtime requires the
dynamic registrar).
* [mtouch/mmp] Add support for reporting errors/warnings that point to the code line causing the error/warning.
Add support for reporting errors/warnings that point to the code line causing
the error/warning by adding ErrorHelper overloads that take the exact
instruction to report (previously we defaulted to the first line/instruction
in a method).
* [tests] Add support for asserting filename/linenumber in warning messages.
* Make all methods that manually create BlockLiterals optimizable.
* [tests] Create a BaseOptimizeGeneratedCodeTest test that's included in both XI's and XM's link all test.
* [tests] Add link all test (for both XI and XM) to test the BlockLiteral.SetupBlock optimization.
* [tests] Add mtouch/mmp tests for the BlockLiteral.SetupBlock optimization.
* [tests][linker] Make the base test class abstract, so tests in the base class aren't executed twice.
* [tests][linker] Don't execute linkall-only tests in linksdk.
The optimization tests only apply when the test assembly is linked, and that
only happens in linkall, so exclude those tests in linksdk.
* [tests][mmptest] Update test according to mmp changes.
Fixes these test failures:
1) Failed : Xamarin.MMP.Tests.MMPTests.MM0132("inline-runtime-arch")
The warning 'MM0132: Unknown optimization: 'inline-runtime-arch'. Valid optimizations are: remove-uithread-checks, dead-code-elimination, inline-isdirectbinding, inline-intptr-size.' was not found in the output:
Message #1 did not match:
actual: 'Unknown optimization: 'inline-runtime-arch'. Valid optimizations are: remove-uithread-checks, dead-code-elimination, inline-isdirectbinding, inline-intptr-size, blockliteral-setupblock.'
expected: 'Unknown optimization: 'inline-runtime-arch'. Valid optimizations are: remove-uithread-checks, dead-code-elimination, inline-isdirectbinding, inline-intptr-size.'
Message #2 did not match:
actual: 'Unknown optimization: 'inline-runtime-arch'. Valid optimizations are: remove-uithread-checks, dead-code-elimination, inline-isdirectbinding, inline-intptr-size, blockliteral-setupblock.'
expected: 'Unknown optimization: 'inline-runtime-arch'. Valid optimizations are: remove-uithread-checks, dead-code-elimination, inline-isdirectbinding, inline-intptr-size.'
2) Failed : Xamarin.MMP.Tests.MMPTests.MM0132("foo")
The warning 'MM0132: Unknown optimization: 'foo'. Valid optimizations are: remove-uithread-checks, dead-code-elimination, inline-isdirectbinding, inline-intptr-size.' was not found in the output:
Message #1 did not match:
actual: 'Unknown optimization: 'foo'. Valid optimizations are: remove-uithread-checks, dead-code-elimination, inline-isdirectbinding, inline-intptr-size, blockliteral-setupblock.'
expected: 'Unknown optimization: 'foo'. Valid optimizations are: remove-uithread-checks, dead-code-elimination, inline-isdirectbinding, inline-intptr-size.'
Message #2 did not match:
actual: 'Unknown optimization: 'foo'. Valid optimizations are: remove-uithread-checks, dead-code-elimination, inline-isdirectbinding, inline-intptr-size, blockliteral-setupblock.'
expected: 'Unknown optimization: 'foo'. Valid optimizations are: remove-uithread-checks, dead-code-elimination, inline-isdirectbinding, inline-intptr-size.'
* [tests][linker] Fix typo.
Fixes this test failure:
1) SetupBlock_CustomDelegate (Linker.Shared.BaseOptimizeGeneratedCodeTest.SetupBlock_CustomDelegate)
Counter
Expected: 1
But was: 2
* [registrar] Minor adjustment to error message to match previous (and better) behavior.
Fixes this test failure:
1) Failed : Xamarin.Registrar.GenericType_WithInvalidParameterTypes
The error 'MT4136: The registrar cannot marshal the parameter type 'System.Collections.Generic.List`1<U>' of the parameter 'arg' in the method 'Open`1.Bar(System.Collections.Generic.List`1<U>)'' was not found in the output:
Message #1 did not match:
actual: 'The registrar cannot marshal the parameter type 'System.Collections.Generic.List`1<Foundation.NSObject>' of the parameter 'arg' in the method 'Open`1.Bar(System.Collections.Generic.List`1<U>)''
expected: 'The registrar cannot marshal the parameter type 'System.Collections.Generic.List`1<U>' of the parameter 'arg' in the method 'Open`1.Bar(System.Collections.Generic.List`1<U>)''
* [docs] mmp shows MM errors/warnings.
* [docs] Improve according to reviews.
* [tests] Fix merge failure causing test duplication.
Converting to and from smart enums and their corresponding native value
requires knowing the conversion function, since each smart enum has its own
conversion function.
The dynamic registrar can do this at runtime, but it's something that can be
computed in the static registrar at build time, so do that. The static
registrar will now embed the metadata token (as a token reference) in the
generated code, which can be used at runtime to find the conversion method,
without requiring anything from dynamic registrar.
This requires some refactoring in the conversion methods to allow passing more
information around (the `context` parameter in the conversion functions, which
the smart enum conversion methods now use for the token reference).
It turns out this is a massive improvement (although the scenarios where this
is relevant are rare): a simple test case [1] is 300x faster (from ~30s to
0.1s).
[1]: https://gist.github.com/rolfbjarne/961af28d1c2727b256fbcdfd6aa65e98
There is a deadlock between the framework lock and the GC lock; resolve this
by making sure we don't execute managed code while holding the framework lock.
The framework lock was introduced in
xamarin/maccore@4a0748b1d8, and from analyzing
that commit message, it seems we're safe as long as nobody retains/releases
NSObjects (in way that makes the retainCount jump to or from 1) while the GC
runs.
Calling `xamarin_unregister_nsobject` does not affect the retain count of the
object; thus it's not necessary to keep the lock during the call to
`xamarin_unregister_nsobject`.
https://bugzilla.xamarin.com/show_bug.cgi?id=599944a0748b1d8
The two functions mono_class_is_nullable and mono_class_get_nullable_param are
private mono symbols, which means we can't call them when using Xamarin.Mac
with libmono from a dynamic library.
Implement a fallback for this case, where we call a managed method when these
functions are not available (and restrict this workaround to Xamarin.Mac only,
since it's not needed for Xamarin.iOS).
- Update Versions-ios and Versions-mac file too.
- Bump maccore and maciostools to the xcode9 branch.
- [builds] Force disable 'futimens' and 'utimensat' so that we build with Xcode 9.
- [builds] 'system' is not available on iOS (simulator).
- [runtime] Fix: cannot initialize a variable of type 'char *' with an rvalue of type 'const char *'
- Prevented building xcode9 branch, see: https://jenkins.mono-project.com/job/xamarin-macios-pr-builder/3886/console
```
runtime.m:1122:9: error: cannot initialize a variable of type 'char *' with an rvalue of type 'const char *'
char *last_sep = strrchr (info.dli_fname, '/');
```
- [registrar] Apple removed a header, so don't include it anymore.
- [mtouch] Don't run the partial static registrar for tvOS.
The generated output doesn't compile because Apple forgot to ship headers for
the ExternalAccessory framework in their tvOS simulator SDK.
* Update to mono 2017-04 branch
* Patch from Zoltan to fix build error with CppSharp.CppParser.dll
* Include new linker files in Makefile, based on mareks commit
* [msbuild] Fix running bgen for Xamarin.Mac.
bgen must be executed with the system mono, not bmac-mobile-mono, and without
the MONO_PATH variable set.
* System.Data tests should act as if they are running on mobile profile
* Add --runtime=mobile to mono flags in Modern
* Move runtime launcher options up
* System.Data tests should use Mobile profile (mac fix)
* Bump 2017-04 to pick up AOT and assembly resolution fixes
* Build fixes for netstandard.dll and System.Drawing.Primitives.dll
The new handling went in with https://github.com/mono/mono/pull/4501.
I also noticed that WatchOS was missing a target for System.Drawing.Primitives.dll, so I added that.
* Add netstandard.dll to 2.1/Facades and System.Drawing.Primitives.dll to WatchOS
* Fix 2.1/Facades/netstandard.dll build
* Fix the netstandard targets
* Bump mono to latest 2017-04 commit
* [xharness] Fix adding defines to csproj by correctly detecting existing defines.
* Bump mono to latest 2017-04 commit
* [mtouch] Update csproj with new files.
* [mtouch] Improve reporting for MarkExceptions from the linker.
* Bump mono to latest 2017-04 commit
* Bump mono to pick up latest 2017-04 branch commit (Fixes#55436)
Fixes https://bugzilla.xamarin.com/show_bug.cgi?id=55436
* Add a missing Makefile dependency
* Chris Hamons patch to apply --runtime=mobile as necessary at AOT time
(It is currently being applied for some configurations at runtime only)
* Bump system mono
* Bump mono for assembly loader changes
* Bump system mono
* Update assemblies list as some where moved to facades
6ca5ec442bc38e4d9220
* Bump mono to latest 2017-04 commit
* Add another new facade
* Bump mono to tip of 2017-04.
* Bump mono to tip of 2017-04.
* [tests][mtouch] Adjust tests to cope with fewer assemblies being included in linked apps. Fixes#56307 and #56308.
System.dll is now completely linked away unless the app actually uses any
System.dll API.
This is the change that caused this to change: 4960d5d2a2
Previously the following types would always be kept by the linker:
```
$ monodis --typedef System.dll
Typedef Table
1: (null) (flist=1, mlist=1, flags=0x0, extends=0x0)
2: ObjCRuntime.INativeObject (flist=1, mlist=1, flags=0xa0, extends=0x0)
3: Mono.Net.CFObject (flist=1, mlist=2, flags=0x100000, extends=0x5)
4: Mono.Net.CFArray (flist=4, mlist=19, flags=0x100, extends=0xc)
5: Mono.Net.CFNumber (flist=5, mlist=32, flags=0x100100, extends=0xc)
6: Mono.Net.CFRange (flist=5, mlist=41, flags=0x100108, extends=0x25)
7: Mono.Net.CFString (flist=7, mlist=42, flags=0x100100, extends=0xc)
8: Mono.Net.CFData (flist=8, mlist=53, flags=0x100100, extends=0xc)
9: Mono.Net.CFDictionary (flist=8, mlist=63, flags=0x0, extends=0xc)
10: Mono.Net.CFMutableDictionary (flist=10, mlist=75, flags=0x100100, extends=0x24)
11: Mono.Net.CFUrl (flist=10, mlist=80, flags=0x100100, extends=0xc)
12: Mono.Net.CFRunLoop (flist=10, mlist=83, flags=0x100100, extends=0xc)
13: Mono.Net.CFBoolean (flist=10, mlist=94, flags=0x100, extends=0x5)
14: Mono.AppleTls.SecCertificate (flist=13, mlist=106, flags=0x100100, extends=0x5)
15: Mono.AppleTls.SecIdentity (flist=14, mlist=122, flags=0x100, extends=0x5)
16: Mono.AppleTls.SecIdentity/ImportOptions (flist=19, mlist=134, flags=0x100105, extends=0x5)
17: Mono.AppleTls.SecKey (flist=19, mlist=134, flags=0x100100, extends=0x5)
18: Mono.AppleTls.SecStatusCode (flist=21, mlist=141, flags=0x100, extends=0x69)
19: Mono.AppleTls.SecTrustResult (flist=395, mlist=141, flags=0x100, extends=0x69)
20: Mono.AppleTls.SecImportExport (flist=404, mlist=141, flags=0x100100, extends=0x5)
21: Mono.AppleTls.SecImportExport/<>c (flist=404, mlist=144, flags=0x102103, extends=0x5)
22: Mono.AppleTls.SecPolicy (flist=406, mlist=147, flags=0x100100, extends=0x5)
23: Mono.AppleTls.SecTrust (flist=407, mlist=154, flags=0x100100, extends=0x5)
24: System.Security.Cryptography.OidGroup (flist=408, mlist=174, flags=0x101, extends=0x69)
25: System.Security.Cryptography.Oid (flist=420, mlist=174, flags=0x100101, extends=0x5)
26: System.Security.Cryptography.CAPI (flist=423, mlist=176, flags=0x100180, extends=0x5)
27: System.Security.Cryptography.AsnEncodedData (flist=423, mlist=178, flags=0x100101, extends=0x5)
28: System.Security.Cryptography.X509Certificates.X509Utils (flist=424, mlist=179, flags=0x100100, extends=0x5)
29: System.Security.Cryptography.X509Certificates.PublicKey (flist=424, mlist=181, flags=0x100101, extends=0x5)
30: System.Security.Cryptography.X509Certificates.X509Certificate2 (flist=429, mlist=188, flags=0x102101, extends=0x51)
31: System.Security.Cryptography.X509Certificates.X509Certificate2Impl (flist=431, mlist=204, flags=0x100080, extends=0x55)
32: System.Security.Cryptography.X509Certificates.X509CertificateCollection (flist=431, mlist=209, flags=0x102101, extends=0x6d)
33: System.Security.Cryptography.X509Certificates.X509CertificateCollection/X509CertificateEnumerator (flist=431, mlist=212, flags=0x100102, extends=0x5)
34: System.Security.Cryptography.X509Certificates.X509Helper2 (flist=432, mlist=217, flags=0x100180, extends=0x5)
35: <PrivateImplementationDetails> (flist=432, mlist=218, flags=0x100, extends=0x5)
36: <PrivateImplementationDetails>/__StaticArrayInitTypeSize=9 (flist=433, mlist=219, flags=0x113, extends=0x25)
```
Some of the above types from System.dll implemented ObjCRuntime.INativeObject
(from System.dll), which our linker detected as implementing
ObjCRuntime.INativeObject (from Xamarin.iOS.dll), so these types were treated
as custom NSObject subclasses, and the MarkNSObjects linker step would mark
them (which would in turn cause all the other types in the list to be marked).
With that change, these types now implement ObjCRuntimeInternal.INativeObject,
and the linker does not treat them as custom NSObject subclasses anymore.
I think the new behavior is correct: these types do not actually inherit from
the real NSObject/INativeObject, so the linker should not treat them as such.
This may run into different bugs because the linker might now remove more
stuff than before, but that would be a different issue.
This means that the fix is to modify these tests accordingly.
https://bugzilla.xamarin.com/show_bug.cgi?id=56307https://bugzilla.xamarin.com/show_bug.cgi?id=56308
* Bump mono to latest.
* Fix merge conflict that was missed
* [mtouch] Renumber new error which clashes with an existing error number in master.
* [runtime] Fix broken indentation to make code less confusing.
* [runtime] Rework initialization for Xamarin.Mac extensions.
1. Delay the Application.Init execution from step 6 in the initialization
sequence, to when we'd run the managed Main function for a normal app. This
makes the code a bit easier to reason about, since both code paths behave
more similar. It's also matches the initialization documentation better
(step 6 is "find the executable", not "find the executable and run
Application.Init").
2. Install custom callbacks for mono's logging function just before calling
Application.Init. We already install these custom callbacks in
xamarin_initialize, but that doesn't help much if something goes wrong
before xamarin_initialize is called (and there's no harm in doing this
twice).
3. Treat the extension dll as an entry assembly, make the path to the entry
assembly available to managed code, and load this assembly if
Assembly.GetEntryAssembly can't find it (which happens for extensions,
since there's no entry point as Assembly.GetEntryAssembly defines an entry
assembly).
This fixes launching of Xamarin.Mac extensions.
* [runtime] Spaces -> tabs.
Store the launch mode in a static variable instead of storing if we're an
extension (since the launch mode also contains that information).
Also pass the launch mode around in Xamarin.Mac's initialization data.
Put simulator assemblies in MonoBundle/simulator for frameworks, so that we
can have a single framework that contains both device and simulator
assemblies without assemblies conflicting between device and simulator.
The device assemblies continue in the same place, in the MonoBundle directory,
so no additional checks are needed on device.
This fixes an issue clang's static analyzer found: if an exception occured in
a call to managed code, we wouldn't process the list of objects to dispose:
trampolines-invoke.m:549:2: warning: Potential leak of memory pointed to by 'dispose_list'
MONO_THREAD_DETACH; // COOP: This will switch to GC_SAFE
^~~~~~~~~~~~~~~~~~
./xamarin/runtime.h:306:11: note: expanded from macro 'MONO_THREAD_DETACH'
} while (0)
^
Fix this by always processing the list of objects to dispose, even if
exceptions occur.
If an extension is sharing code with the container app, then assemblies may be
placed in:
* The container app's Framework directory (for assemblies whose code is
shared, and the build action is 'framework'). We already handle this case.
* The container app's root directory (for assemblies whose code is shared, and
the build action is not 'framework'). This case we didn't handle, and we're
now fixing it.
* In the extension (for assemblies whose code is not shared). We already
handle this case.
Add support for finding assembly-related resources (debug files, config files,
satellite assemblies, aotdata files, etc) in multiple locations:
* The bundle's root directory.
* A pointer-size specific size directory (.monotouch-32|64)
* A framework's MonoBundle directory (and the framework may not be named after
the assembly, which means it's not necessarily possible to deduce the
framework's name at runtime).
* In a container bundle.
Some files may also have an arch-specific suffix.
* [XM] Seperate parsing from compilation in AOT code
- Parsing command line options was too entangled with actually compiling
- Refactor test code to centralize Compile, reducing some complexity of tests
- Groundwork for hybrid vs non-hybrid AOT work
* Add hybrid/standard AOT support
* Add xammac_tests to makefile/jenkins
* Add flag to force AOT
* Disable MonoTouchFixtures.Contacts.ContactStoreTest.GetUnifiedContacts on XM due to prompts on Jenkins
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% |
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
Setting this option prints this to stdout:
> Mono Warning: option gen-compact-seq-points is deprecated.
and it's ignored, so just don't set this option.
Example code:
public override void ViewDidLoad ()
{
throw new Exception ("USELESS");
}
Current output with unhandled exceptions that are marshaled:
Unhandled Exception:
System.Exception: USELESS
at (wrapper managed-to-native) AppKit.NSApplication:NSApplicationMain (int,string[])
at AppKit.NSApplication.Main (System.String[] args) [0x00041] in /work/maccore/master/xamarin-macios/src/AppKit/NSApplication.cs:98
at UselessExceptions.MainClass.Main (System.String[] args) [0x00007] in /Users/rolf/Downloads/filed-bug-test-cases-master/Xamarin/bxc45742/Main.cs:10
[ERROR] FATAL UNHANDLED EXCEPTION: UselessExceptions.CustomException: USELESS
at (wrapper managed-to-native) AppKit.NSApplication:NSApplicationMain (int,string[])
at AppKit.NSApplication.Main (System.String[] args) [0x00041] in /work/maccore/master/xamarin-macios/src/AppKit/NSApplication.cs:98
at UselessExceptions.MainClass.Main (System.String[] args) [0x00007] in /Users/rolf/Downloads/filed-bug-test-cases-master/Xamarin/bxc45742/Main.cs:10
Note how the managed frame where the exception was thrown does not show up.
This is because we technically catch exceptions when marshaling them, and then
later we call mono_raise_exception to raise the same exception. Unfortunately
that leads to overwriting the initial stack trace, and we end up with a stack
trace that does not include the location where the original exception was
thrown.
So instead of calling mono_raise_exception to rethrow the same exception, we
use ExceptionDispatchInfo, which is able to capture the stack trace for both
the original exception and the new exception, producing the following output:
System.Exception: USELESS
at UselessExceptions.ViewController.ViewDidLoad () [0x0000c] in /Users/rolf/Downloads/filed-bug-test-cases-master/Xamarin/bxc45742/ViewController.cs:27
--- End of stack trace from previous location where exception was thrown ---
at (wrapper managed-to-native) AppKit.NSApplication:NSApplicationMain (int,string[])
at AppKit.NSApplication.Main (System.String[] args) [0x00041] in /work/maccore/master/xamarin-macios/src/AppKit/NSApplication.cs:98
at UselessExceptions.MainClass.Main (System.String[] args) [0x00007] in /Users/rolf/Downloads/filed-bug-test-cases-master/Xamarin/bxc45742/Main.cs:10
[ERROR] FATAL UNHANDLED EXCEPTION: UselessExceptions.CustomException: USELESS
at UselessExceptions.ViewController.ViewDidLoad () [0x0000c] in /Users/rolf/Downloads/filed-bug-test-cases-master/Xamarin/bxc45742/ViewController.cs:27
--- End of stack trace from previous location where exception was thrown ---
at (wrapper managed-to-native) AppKit.NSApplication:NSApplicationMain (int,string[])
at AppKit.NSApplication.Main (System.String[] args) [0x00041] in /work/maccore/master/xamarin-macios/src/AppKit/NSApplication.cs:98
at UselessExceptions.MainClass.Main (System.String[] args) [0x00007] in /Users/rolf/Downloads/filed-bug-test-cases-master/Xamarin/bxc45742/Main.cs:10
Incidently this is how Xamarin.Android does it [1].
[1]: 9387f2fe16https://bugzilla.xamarin.com/show_bug.cgi?id=45742
* [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.
We've used the dynamic registrar for years now when selecting the IL registrar
(and I've never heard about anybody doing it), so just remove all the related
(and in fact dead) code.
* [runtime] Use printf on watchOS, NSLog doesn't shown up (by default).
* [runtime] Use a wrapper function for logging.
So that we can chose between printf and NSLog at runtime,
depending on where we're running.
This way we can pass pointers to managed objects to the native objects
without the coop GC interfering (since icalls won't automatically
switch to "gc safe" mode).
In particular NSMethodSignature chokes on encodings like this:
[NSDecimalNumber initWithDecimal:] = "@36@0:8{?=b8b4b1b1b18[8S]}16"
with an exception:
NSInvalidArgumentException Reason: +[NSMethodSignature signatureWithObjCTypes:]: unsupported type encoding spec '{?}'
so implement our own code to calculate the frame size.
Rolf Bjarne Kvinge
Chris Hamons
Vincent Dondain
Vincent Dondain
Andi McClure
Sebastien Pouliot
Zoltan Varga