Граф коммитов

70 Коммитов

Автор SHA1 Сообщение Дата
Rolf Bjarne Kvinge 0511006ec2
[mtouch/mmp] Introduce more specific helper functions for locating libxamarin*.dylib and Xamarin*.framework. (#8538)
This allows a little bit more sharing between mmp and mtouch.
2020-05-07 16:20:07 +02:00
Rolf Bjarne Kvinge c81f254a28
[mtouch/mmp] Share Driver.GetFrameworks. (#8511) 2020-05-05 16:52:56 +02:00
Rolf Bjarne Kvinge acfb101a78
[mtouch/mmp] Share the Application.References field. (#8507) 2020-05-05 15:35:02 +02:00
Rolf Bjarne Kvinge 6a407b7989
[linker] Make the corlib name dynamic. (#8499)
Use the correct corlib name depending on whether we're targeting .NET or Mono,
since there's no mscorlib.dll anymore in .NET.
2020-05-04 18:31:48 +02:00
Rolf Bjarne Kvinge e4f8460277
[mmp/mtouch] Share more code. (#8394)
* Rearrange files in Xamarin.Mac a bit to ease code sharing between mmp and
  mtouch, by putting mono's static and dynamic libraries in
  /Library/Frameworks/Xamarin.Mac.framework/Versions/Current/Sdks/Xamarin.macOS.sdk
  to match how Xamarin.iOS does it.

* Don't use 'usr' as an intermediate directory. This removes another special
  case.

* Share many of the functions and properties that return specific directories,
  and document (as comments) what each function/property is supposed to
  return.
2020-04-16 14:19:45 +02:00
Rolf Bjarne Kvinge c0abd628d3
[mtouch/mmp] Use the standard DEBUG define to determine when we're running from inside an IDE. (#8311)
We're using the Release configuration to build the mtouch and mmp binaries
that we ship, which means that we can use the Debug configuration for
debugging from an IDE, and use the standard conditional compilation symbols to
identify that case.
2020-04-08 16:20:04 +02:00
Rolf Bjarne Kvinge 3a30097d3a
[mtouch/mmp] Add better diagnostics if xcrun returns invalid data. (#8166) 2020-03-23 12:29:23 +01:00
Rolf Bjarne Kvinge c6e9932be9
[mtouch/mmp] Only use stdout from xcrun as the path of the file that was found. Fixes #8147. (#8150)
* [mtouch/mmp] Only use stdout from xcrun as the path of the file that was found. Fixes #8147.

xcrun can print stuff to stderr even if it succeeds and prints what it found
to stdout, which means we have to separate stdout and stderr when capturing
xcrun's output.

This also means that we need a few changes to our RunCommand API:

* Add support for capturing stdout and stderr separately by providing
  different callbacks/StringBuilder instances.
* Use overloads instead of default arguments, because with default arguments
  we end up with ambiguous matches in a lot of places with the new overloads.

Fixes https://github.com/xamarin/xamarin-macios/issues/8147.

* [tests] Fix mmptest build.

* [mtouch/mmp] Fix process log output.
2020-03-20 17:46:43 +01:00
Rolf Bjarne Kvinge 4d7186028e
[mtouch/mmp] Improve target framework code. (#8137)
* Unify target framework code between mtouch and mmp.
* Simplify the code in mmp: have three possible valid target frameworks for
  most of code, and add special code to handle setting any other valid target
  frameworks to redirect to one of those three valid target frameworks (and
  warn if given any of those valid, but not "main", target frameworks). Any
  other code can then depend on the target framework having exactly one of
  those specific values, which means we can make IsUnified* variables
  convenience properties instead.
* Unify a bit more of the argument parsing code between mtouch and mmp, since
  that made a few other things easier.
* Add TargetFramework.IsValidFramework to have one validation implementation.
* Move the implementation of TargetFramework.MonoFrameworkDirectory to mmp
  itself, it's not really related to the target framework.
* Remove Driver.IsUnified and IsClassic from mmp, they're not used anymore.
* Formally deprecate --xamarin-[full|system]-framework in mmp, they've really been deprecated for many years.
* Remove LinkerOptions.TargetFramework, it's not used anymore.
* Get rid of mmp's userTargetFramework fried, it's duplicated with the
  targetFramework field.
* Add a few tests, and tweak others a bit.

Breaking changes:

* Both mtouch and mmp require --target-framework now. The only direct
  consumers should be the MSBuild tasks, which already pass --target-framework
  all the time. This simplifies code, and removes assumptions.
2020-03-19 09:28:09 +01:00
Rolf Bjarne Kvinge 13a56ffb95
[mtouch/mmp] Rework how we find developer tools. Partial fix for #4634 and fixes #8005. (#8121)
Partial fix for https://github.com/xamarin/xamarin-macios/issues/4634.
Fixes https://github.com/xamarin/xamarin-macios/issues/8005.
2020-03-17 15:49:39 +01:00
Sebastien Pouliot 54f2dae935
[mtouch] Add `force-rejected-types-removal` optimization (#8009)
This optimization can be enabled when it's not possible to use the
managed linker (e.g. **Don't link**) or when the managed linker cannot
remove references to deprecated types that would cause an application
to be rejected by Apple.

References to the existing types will be renamed, e.g. `UIWebView` to
`DeprecatedWebView`, in every assemblies.

The type definition is also renamed (for validity) and all custom
attributes on the types and their members will be removed.
Code inside the members will be replaced with a
`throw new NotSupportedException ();`.

The msbuild test app `MyReleaseBuild` has been updated to test that the
optimization is working as expected (device builds are slow so reusing
this test has little impact in test time).

Basically the test ensure that `UIWebView` is used and cannot be removed
by the compiler (optimization) or the managed linker (since it's
referenced). Since the optimization is enabled then we can `grep` then
final `.app` directory to ensure there's no mention of `UIWebView` inside
any of the files that would be submitted.

The application can be run, by itself, and will turn green if OK, red if
`DeprecatedWebView` can't be found (skeleton replacement for `UIWebView`)
or orange if a `NotSupportedException` is thrown.

Finally introspection tests have been updated to skip over the deprecated
(and renamed) types. It should not be an issue right now, since this
optimization is not enabled by default, but it made testing easier.
2020-03-02 09:20:29 -05:00
Rolf Bjarne Kvinge d2d93b6ec9
[mtouch/mmp] Share boolean parsing logic. (#7967) 2020-02-25 07:00:58 +01:00
Sebastien Pouliot 1ce5eeb3dc
[mtouch][mmp] Fix possible exception when logging strings with `{x}` (#7941)
We can end up with a format that has `{x}` inside it and no argument. If
this is logged (which depends on verbosity level) then we end up with an
uncaught exceptions and either `MT0000` or `MM0000` errors.

This happens in #7904 due to other, unrelated, issues (a variable is not
expanded) but this can happen in other circumstances, e.g. a file could
be named `{x}.cs`.

The easy fix is to use the right `Console.WriteLine` overload if there
are no arguments provided. This is always good since it avoid an non
required call to `String.Format`.

Fixes https://github.com/xamarin/xamarin-macios/issues/7904
2020-02-20 14:52:25 -05:00
Rolf Bjarne Kvinge 759180672d
[mtouch/mmp] Share code to locate the framework directory. (#7911) 2020-02-19 09:23:52 -05:00
Rolf Bjarne Kvinge 984374157c
[mtouch/mmp] Share Main. (#7910) 2020-02-18 16:05:42 -05:00
Rolf Bjarne Kvinge 96d5d3e02b
[mtouch/mmp] Share verbosity code. (#7908) 2020-02-18 15:44:19 -05:00
Waleed Chaudhry 00985a55e2
[Localization] mtouch/mmp C# (#7710) 2020-01-31 15:02:52 -05:00
Rolf Bjarne Kvinge a8fdf6db6e
Implement a different escaping/quoting algorithm for arguments to System.Diagnostics.Process. (#7177)
* Implement a different escaping/quoting algorithm for arguments to System.Diagnostics.Process.

mono changed how quotes should be escaped when passed to
System.Diagnostic.Process, so we need to change accordingly.

The main difference is that single quotes don't have to be escaped anymore.

This solves problems like this:

    System.ComponentModel.Win32Exception : ApplicationName='nuget', CommandLine='restore '/Users/vsts/agent/2.158.0/work/1/s/tests/sampletester/bin/Debug/repositories/ios-samples/WorkingWithTables/Part 3 - Customizing a Table\'s appearance/3 - CellCustomTable/CellCustomTable.sln' -Verbosity detailed -SolutionDir '/Users/vsts/agent/2.158.0/work/1/s/tests/sampletester/bin/Debug/repositories/ios-samples/WorkingWithTables/Part 3 - Customizing a Table\'s appearance/3 - CellCustomTable'', CurrentDirectory='/Users/vsts/agent/2.158.0/work/1/s/tests/sampletester/bin/Debug/repositories', Native error= Cannot find the specified file
      at System.Diagnostics.Process.StartWithCreateProcess (System.Diagnostics.ProcessStartInfo startInfo) [0x0029f] in /Users/builder/jenkins/workspace/build-package-osx-mono/2019-08/external/bockbuild/builds/mono-x64/mcs/class/System/System.Diagnostics/Process.cs:778

ref: https://github.com/mono/mono/pull/15047

* Rework process arguments to pass arrays/lists around instead of quoted strings.

And then only convert to a string at the very end when we create the Process
instance.

In the future there will be a ProcessStartInfo.ArgumentList property we can
use to give the original array/list of arguments directly to the BCL so that
we can avoid quoting at all. These changes gets us almost all the way there
already (except that the ArgumentList property isn't available quite yet).

We also have to bump to target framework version v4.7.2 from v4.5 in several
places because of 'Array.Empty<T> ()' which is now used in more places.

* Parse linker flags from LinkWith attributes.

* [sampletester] Bump to v4.7.2 for Array.Empty<T> ().

* Fix typo.

* Rename GetVerbosity -> AddVerbosity.

* Remove unnecessary string interpolation.

* Remove unused variable.

* [mtouch] Simplify code a bit.

* Use implicitly typed arrays.
2019-10-14 16:18:46 +02:00
Rolf Bjarne Kvinge 303aa0a649 Merge remote-tracking branch 'origin/xcode11' into master-xcode11 2019-09-13 18:35:18 +02:00
Rolf Bjarne Kvinge ec09193daf
Build native code with -std=c++14. (#6864)
* Build native code with -std=c++14.

Apple's headers now require -std=c++14 to compile their headers in C++ mode.

This fixes a compile error that would occur with the PhotosUI framework when
compiling code for C++.

* [mmp] Use -std=c++14 when compiling.

* Fix command line output.

* [mmp] Add all source files at the end, so they all get the -x clang argument applied.

* Limit when using c++14 in mtouch according to language.
2019-08-29 08:49:06 -07:00
Rolf Bjarne Kvinge b8e9c83ce0
[mtouch] Detect when we run into the 32-bit arm size limitation, and report a better error. Fixes #6526. (#6855)
Also limit the output from the native compiler, so that we don't overload the
IDEs with output if the native compiler produces tens of thousands of errors.

Fixes https://github.com/xamarin/xamarin-macios/issues/6526.
2019-08-28 04:54:26 -07:00
Rolf Bjarne Kvinge 6075a9aa5b
[mmp] Remove support for 32-bit apps. Partial fix for #6300. (#6642)
Partial fix for https://github.com/xamarin/xamarin-macios/issues/6300.
2019-07-24 09:01:14 -07:00
Rolf Bjarne Kvinge ef0d7a1718
[generator] Show proper errors when failing to compile something. (#6003)
* [mtouch/mmp] Split out the RunCommand[Async] methods to a separate file so that the generator can reuse more easily.

* [generator] Show proper errors when failing to compile something.

* Fix grammar
2019-05-07 13:40:59 +02:00
Rolf Bjarne Kvinge a36019c83c
[mtouch/mmp] Remove dead code. (#5997) 2019-05-06 14:40:31 +02:00
Sebastien Pouliot 61372a06ba
[mtouch] Disable some optimizations when the interpreter is enabled (#5770)
Some optimizations are not safe to apply when dynamically loading code
at runtime. This is not possible when ahead-of-time (AOT) compilation
is used, so those options were always enabled in the past. The
interpreter is changing the situation so those optimizations are now
disabled, when the interpreter is enabled.

The disabled optimizations are:

* 'remove-dynamic-registrar' when using the interpreter

This avoid the following exception when unknown (at build time) code
tries to register (at runtime)

```
Unhandled Exception:
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> ObjCRuntime.RuntimeException: Can't register the class SubclassDemo.CustomView when the dynamic registrar has been linked away.
```

* 'inline-isdirectbinding' when using the interpreter

This avoid crashing (at runtime) when types are subclasses by the
interpreter (code unknown to `mtouch` at build time).

* 'register-protocols' when the interpreter is enabled

Dynamically loaded code can include protocols. When the optimization is
enabled then they won't be registered and won't work as expected.

Note: It is possible to re-enable the optimization(s), either one or all,
if the interpreter is not used to dynamically load code at runtime.
2019-03-15 09:05:53 -05:00
Rolf Bjarne Kvinge 011d91e093
[mtouch] Document --optimize=remove-unsupported-il-for-bitcode in mtouch --help. (#5609) 2019-02-14 18:36:29 +01:00
Rolf Bjarne Kvinge 012a0650b6
[mtouch] Fix formatting for MT0079 and update the MT4134 test to take into account the warning. Fixes maccore#1116. (#5089)
Fixes https://github.com/xamarin/maccore/issues/1116.
2018-11-06 15:06:10 +01:00
Rolf Bjarne Kvinge ef8f1dcbfe
[mtouch/mmp] Unify Xcode lookup & verification code in mtouch and mmp. (#5077)
Share all the code to find and verify Xcode between mtouch and mmp.

Also print out the actual product version when logging which Xcode was used
(to make it easier to detect if a beta version is in use).
2018-11-05 08:16:29 +01:00
Vincent Dondain eec95e881c Merge branch 'd15-8' into xcode10-rebase-15.8 2018-08-13 21:04:56 -04:00
Sebastien Pouliot 2d6ce7459d
Bump to use Xcode 10 beta 1 (#4179)
* Bump to use Xcode 10 beta 1

* Update Versions.plist

* Add a dependency on Xcode 9.4.

* [msbuild] Fix build with Xcode 10 beta 1. (#4182)

Many years ago (in Xcode 7 according to code comment)
Developer/Platforms/iPhoneOS.platform/Developer/usr disappeared, and we coped
by looking at Developer/usr instead (and also the subsequent code to locate
the bin directory was based on the location of the usr directory).

Developer/Platforms/iPhoneOS.platform/Developer/usr reappeared in Xcode 10
beta 1, but it seems useless (for one it doesn't contain a bin directory), so
in order to try to keep things sane don't look for this directory in Xcode 10
and instead go directly for Developer/usr (which is what we've been using as
the usr directory for years anyway).

Fixes this problem when building apps with Xcode 10 beta 1:

      /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/iOS/Xamarin.iOS.Common.targets(626,3): error : Could not locate SDK bin directory [/Users/rolf/Projects/TestApp/test-app.csproj]

* [runtime] Build 32-bit mac executables using Xcode 9.4.

* [mtouch] Work around broken tvOS headers in Xcode 10 beta 1.

* [mtouch] Work around build problem with Apple's simd headers in Objective-C++ mode.

* Use version-agnostic paths to sdk directories.

* [tests][xtro] Add todo files (from unclassified) and adjust ignore files to avoid errors

* [macos][security] Re-enable SSL[Get|Set]AlpnProtocols. Fixes #4001 (#4022)

* [macos][security] Re-enable SSL[Get}Set]AlpnProtocols. Fixes #4001

This was fixed in macOS 10.13.4

https://github.com/xamarin/xamarin-macios/issues/4001

* [tests][monotouch-tests] Disable a few test cases (one crasher, other failures). Causes to be verified later

* [xharness] Fix permission dialog suppression in Xcode 10.

* [xharness] Ignore 32-bit macOS tests by default.

* [tests] Execute mmp regression tests with Xcode 9.4 since many of them are 32-bit and needs porting to 64-bit.

* [mmptest] Ignore 32-bit XM tests if we don't have a 32-bit-capable Xcode.

* [registrar] Add workaround for broken headers in Xcode 10 beta 1 (radar 40824697).

* [mtouch] Restrict another workaround for an Xcode 10 beta 1 bug to a specific Xcode version to remove it asap.

* [tests] Fix some protocol changes (public or not) find by introspection tests

* [tests][intro] Fix DefaultCtorAllowed failures

* [Intents] Obsolete several Intents classes in watchOS.

Several existing Intents classes have been marked as unavailable in watchOS in
the headers in Xcode 10 beta 1, and corresponding tests are now failing.

So obsolete the managed wrapper types, and fix tests accordingly.

* Fix xtro wrt previous Ietents/intro changes

* [tests] Minor adjustments to mtouch tests to work with Xcode 10.

* [msbuild] Update tests to cope with additional files produced by the Core ML compiler.

* [msbuild] Xcode 10 doesn't support building watchOS 1 apps, so show a clear error message explaining it.

Also update tests accordingly.

* [coreimage] Stub new filters and exclude ?removed? ones from tests

* Update GameplayKit and SpriteKit NSSecureCoding _upgrade_ and fix other non-public cases (in tests)

* [tests] Ignore some GameKit selectors that don't respond anymore (but seems to be available, at least in header files)

* [tests] Fix intro 32bits testing for filters resutls

* [msbuild] Slightly change error message to be better English.
2018-06-08 18:45:24 -07:00
Sebastien Pouliot b2e6aba41c
[mtouch][mmp] Add better easier, more complete timestamps to see where time is spent (#4150)
* Share the stopwatch code between `mtouch` and `mmp`;

* Add more details on linker steps. Sadly substeps are executed on the
  metadata so they can't be reported individually;

* Add a few places where timestamps where missing to get better precision
  on the linking part;
2018-05-29 13:08:34 -04:00
Vincent Dondain 0a9453c1f2 [msbuild] Use a response file in 'MmpTaskBase' (#3927)
- Fixes #3698: [msbuild] Use response file for mmp's msbuild task
(https://github.com/xamarin/xamarin-macios/issues/3698)
- Update Common/Driver to log arguments for all verbosity levels except quiet.
  This makes it so mmp's /verbose when used in a response file prints the provided arguments.
- No test yet because of lack of Xamarin.Mac msbuild task test infrastructure.
  See: https://github.com/xamarin/xamarin-macios/issues/3926
2018-04-14 16:13:14 -04:00
Rolf Bjarne Kvinge e30756cf8c
[mtouch] Fix parsing of --root-assembly. (#3933)
Fix parsing of --root-assembly to make the assembly required. This also means
that `--root-assembly /path/to/assembly` (a space separator instead of colon
or equals) will now work.
2018-04-13 14:50:28 +02:00
Chris Hamons cabc4fbe2c [mmp] Add stripping of 32-bit dylibs to work with new App Store restrictions (#3387) (#3633)
- https://github.com/xamarin/xamarin-macios/issues/3367
- App Store will now fail builds if you add in a 32-bit dylib
- If you are a 32-bit app you don't need the 64-bit part of your fat
dylib anyway
- Add --optimize=-trim-architectures to allow customization of behavior, as not everyone
uses app store

In addition, while writing tests for this is was noticed that mmp tests did not "really" run Release configuration correctly in most cases. Fixing this turned out to be a bit of a pain, but necessary to correctly test this (and other things).

- Turns out that /p:configuration:debug is not sufficient to tell mmp to
do the right thing
- That, in most projects, sets the DebugSymbols property, which really
is what is checked.
- However, two of our projects did not have that, so we always did
release mmp work.
- Removed configuration property for tests and added real "Release"
configuration option
2018-03-02 14:33:27 +01:00
Chris Hamons ca4360116c
[mmp] Add stripping of 32-bit dylibs to work with new App Store restrictions (#3387)
- https://github.com/xamarin/xamarin-macios/issues/3367
- App Store will now fail builds if you add in a 32-bit dylib
- If you are a 32-bit app you don't need the 64-bit part of your fat
dylib anyway
- Add --optimize=-trim-architectures to allow customization of behavior, as not everyone
uses app store

In addition, while writing tests for this is was noticed that mmp tests did not "really" run Release configuration correctly in most cases. Fixing this turned out to be a bit of a pain, but necessary to correctly test this (and other things).

- Turns out that /p:configuration:debug is not sufficient to tell mmp to
do the right thing
- That, in most projects, sets the DebugSymbols property, which really
is what is checked.
- However, two of our projects did not have that, so we always did
release mmp work.
- Removed configuration property for tests and added real "Release"
configuration option
2018-03-01 09:36:06 -06:00
Rolf Bjarne Kvinge 2a29d0e0aa
[mtouch/mmp] Fix tracking of whether the static registrar should run again or not. Fixes #641. (#3534) (#3536)
* [tests] Improve debug spew for the RebuildTest_WithExtensions test.

* [mtouch/mmp] Store/load if the dynamic registrar is removed or not into the cached link results.

Store/load if the dynamic registrar is removed or not into the cached link
results, so that we generate the correct main.m even if cached linker results
are used.

* [mtouch/mmp] The static registrar must not execute if we're loading cached results from the linker.

The static registrar must not execute if we're loading cached results from the
linker, because the static registrar needs information from the linker that's
not restored from the cache.

* [mtouch/mmp] Share Touch code.

* [mtouch/mmp] Make it possible to touch inexistent files (to create them).

* [mtouch/mmp] Fix tracking of whether the static registrar should run again or not.

The recent changes to support optimizing away the dynamic registrar caused the
Xamarin.MTouch.RebuildTest_WithExtensions test to regress.

The problem
-----------

* The linker now collects and stores information the static registrar needs.
* This information is not restored from disk when the linker realizes that it
  can reload previously linked assemblies instead of executing again.
* The static registrar runs again (for another reason).
* The information the static registrar needs isn't available, and incorrect
  output follows.

So fix 1: show an error if the static registrar runs when the linker loaded
cached results.

The exact scenario the test ran into is this:

* 1st build: everything is new and everything is built.
* 2nd build: contents of .exe changes, the linker runs again, the static
  registrar runs again, but sees that the generated output didn't change, so
  it doesn't write the new content to disk (this is an optimization to avoid
  compiling the registrar.m file again unless needed).
* 3rd build: only the .exe timestamp changes, the linker sees nothing changes
  in the contents of the .exe and loads the previously linked assemblies from
  disk, the static registrar sees that the .exe's timestamp is newer than
  registrar.m's timestamp and run again, but doesn't produce the right result
  because it doesn't have the information it needs.

Considered solutions
--------------------

1. Only track timestamps, not file contents. This is not ideal, since it will
   result in more work done: in particular for the case above, it would add a
   registrar.m compilation in build #2, and linker rerun + static registrar
   rerun + registrar.m compilation + final native link in build #3.
2. Always write the output of the static registrar, even if it hasn't changed.
   This is not ideal either, since it will also result in more work done: for
   the case above, it would add a registrar.m compilation + final native link
   in build #3.
3. Always write the output of the static registrar, but track if it changed or
   not, and if it didn't, just touch registrar.o instead of recompiling it.
   This only means the final native link in build #3 is added (see #5 for why
   this is worse than it sounds).
4. Always write the output of the static registrar, but track it it changed or
   not, and if it didn't, just touch registrar.o instead of recompiling it,
   and track that too, so that the final native link in build #3 isn't needed
   anymore. Unfortunately this may result in incorrect behavior, because now
   the msbuild tasks will detect that the executable has changed, and may run
   dsymutil + strip again. The executable didn't actually change, which means
   it would be the previously stripped executable, and thus we'd end up with
   an empty .dSYM because we ran dsymtil on an already stripped executable.
5. Idea #4, but write the output of the final link into a temporary directory
   instead of the .app, so that we could track whether we should update the
   executable in the .app or not. This is not optimal either, because
   executables can be *big* (I've seen multi-GB tvOS bitcode executables), and
   extra copies of such files should not be taken lightly.
6. Idea #4, but tell the MSBuild tasks that dsymutil/strip doesn't need to be
   rerun even if the timestamp of the executable changed. This might actually
   work, but now the solution's become quite complex.

Implemented solution
--------------------

Use stamp files to detect whether a file is up-to-date or not.

In particular:

* When we don't write to a file because the new contents are identical to the
  old contents, we now touch a .stamp file. This stamp file means "the
  accompanying file was determined to be up-to-date when the stamp was
  touched."
* When checking whether a file is up-to-date, also check for the presence of a
  .stamp file, and if it exists, use the highest timestamp between the stamp
  file and the actual file.

Now the test scenario becomes:

* 1st build: everything is new and everything is built.
* 2nd build: contents of .exe changes, the linker runs again, the static
  registrar runs again, but sees that the generated output didn't change, so
  it doesn't write the new content to disk, but it creates a registrar.m.stamp
  file to indicate the point in time when registrar.m was considered up-to-
  date.
* 3rd build: only the .exe timestamp changes, the linker sees nothing changes
  in the contents of the .exe and loads the previously linked assemblies from
  disk, the static registrar sees that the .exe's timestamp is *older* than
  registrar.m.stamp's timestamp and doesn't run again.

We only use the stamp file for source code (registrar.[m|h], main.[m|h],
pinvokes.[m|h]), since using it every time has too much potential for running
into other problems (for instance we should never create .stamp files inside
the .app).

Fixes these test failures:

    1) Failed : Xamarin.MTouch.RebuildTest_WithExtensions("single","",False,System.String[])
      single
      Expected: <empty>
      But was:  < "/Users/builder/data/lanes/5746/4123bf7e/source/xamarin-macios/tests/mtouch/bin/Debug/tmp-test-dir/Xamarin.Tests.BundlerTool.CreateTemporaryDirectory371/testApp.app/testApp is modified, timestamp: 2/15/2018 3:04:11 PM > 2/15/2018 3:04:09 PM" >

    2) Failed : Xamarin.MTouch.RebuildTest_WithExtensions("dual","armv7,arm64",False,System.String[])
      dual
      Expected: <empty>
      But was:  < "/Users/builder/data/lanes/5746/4123bf7e/source/xamarin-macios/tests/mtouch/bin/Debug/tmp-test-dir/Xamarin.Tests.BundlerTool.CreateTemporaryDirectory375/testApp.app/testApp is modified, timestamp: 2/15/2018 3:06:03 PM > 2/15/2018 3:06:00 PM" >

    3) Failed : Xamarin.MTouch.RebuildTest_WithExtensions("llvm","armv7+llvm",False,System.String[])
      llvm
      Expected: <empty>
      But was:  < "/Users/builder/data/lanes/5746/4123bf7e/source/xamarin-macios/tests/mtouch/bin/Debug/tmp-test-dir/Xamarin.Tests.BundlerTool.CreateTemporaryDirectory379/testApp.app/testApp is modified, timestamp: 2/15/2018 3:07:14 PM > 2/15/2018 3:07:12 PM" >

    4) Failed : Xamarin.MTouch.RebuildTest_WithExtensions("debug","",True,System.String[])
      debug
      Expected: <empty>
      But was:  < "/Users/builder/data/lanes/5746/4123bf7e/source/xamarin-macios/tests/mtouch/bin/Debug/tmp-test-dir/Xamarin.Tests.BundlerTool.CreateTemporaryDirectory383/testApp.app/testApp is modified, timestamp: 2/15/2018 3:08:16 PM > 2/15/2018 3:08:13 PM" >

    5) Failed : Xamarin.MTouch.RebuildTest_WithExtensions("single-framework","",False,System.String[])
      single-framework
      Expected: <empty>
      But was:  < "/Users/builder/data/lanes/5746/4123bf7e/source/xamarin-macios/tests/mtouch/bin/Debug/tmp-test-dir/Xamarin.Tests.BundlerTool.CreateTemporaryDirectory387/testApp.app/testApp is modified, timestamp: 2/15/2018 3:09:18 PM > 2/15/2018 3:09:16 PM" >

Fixes https://github.com/xamarin/maccore/issues/641
2018-02-20 11:43:23 +01:00
Rolf Bjarne Kvinge 3113c5d2b5
[mtouch/mmp] Fix tracking of whether the static registrar should run again or not. Fixes #641. (#3534)
* [tests] Improve debug spew for the RebuildTest_WithExtensions test.

* [mtouch/mmp] Store/load if the dynamic registrar is removed or not into the cached link results.

Store/load if the dynamic registrar is removed or not into the cached link
results, so that we generate the correct main.m even if cached linker results
are used.

* [mtouch/mmp] The static registrar must not execute if we're loading cached results from the linker.

The static registrar must not execute if we're loading cached results from the
linker, because the static registrar needs information from the linker that's
not restored from the cache.

* [mtouch/mmp] Share Touch code.

* [mtouch/mmp] Make it possible to touch inexistent files (to create them).

* [mtouch/mmp] Fix tracking of whether the static registrar should run again or not.

The recent changes to support optimizing away the dynamic registrar caused the
Xamarin.MTouch.RebuildTest_WithExtensions test to regress.

The problem
-----------

* The linker now collects and stores information the static registrar needs.
* This information is not restored from disk when the linker realizes that it
  can reload previously linked assemblies instead of executing again.
* The static registrar runs again (for another reason).
* The information the static registrar needs isn't available, and incorrect
  output follows.

So fix 1: show an error if the static registrar runs when the linker loaded
cached results.

The exact scenario the test ran into is this:

* 1st build: everything is new and everything is built.
* 2nd build: contents of .exe changes, the linker runs again, the static
  registrar runs again, but sees that the generated output didn't change, so
  it doesn't write the new content to disk (this is an optimization to avoid
  compiling the registrar.m file again unless needed).
* 3rd build: only the .exe timestamp changes, the linker sees nothing changes
  in the contents of the .exe and loads the previously linked assemblies from
  disk, the static registrar sees that the .exe's timestamp is newer than
  registrar.m's timestamp and run again, but doesn't produce the right result
  because it doesn't have the information it needs.

Considered solutions
--------------------

1. Only track timestamps, not file contents. This is not ideal, since it will
   result in more work done: in particular for the case above, it would add a
   registrar.m compilation in build #2, and linker rerun + static registrar
   rerun + registrar.m compilation + final native link in build #3.
2. Always write the output of the static registrar, even if it hasn't changed.
   This is not ideal either, since it will also result in more work done: for
   the case above, it would add a registrar.m compilation + final native link
   in build #3.
3. Always write the output of the static registrar, but track if it changed or
   not, and if it didn't, just touch registrar.o instead of recompiling it.
   This only means the final native link in build #3 is added (see #5 for why
   this is worse than it sounds).
4. Always write the output of the static registrar, but track it it changed or
   not, and if it didn't, just touch registrar.o instead of recompiling it,
   and track that too, so that the final native link in build #3 isn't needed
   anymore. Unfortunately this may result in incorrect behavior, because now
   the msbuild tasks will detect that the executable has changed, and may run
   dsymutil + strip again. The executable didn't actually change, which means
   it would be the previously stripped executable, and thus we'd end up with
   an empty .dSYM because we ran dsymtil on an already stripped executable.
5. Idea #4, but write the output of the final link into a temporary directory
   instead of the .app, so that we could track whether we should update the
   executable in the .app or not. This is not optimal either, because
   executables can be *big* (I've seen multi-GB tvOS bitcode executables), and
   extra copies of such files should not be taken lightly.
6. Idea #4, but tell the MSBuild tasks that dsymutil/strip doesn't need to be
   rerun even if the timestamp of the executable changed. This might actually
   work, but now the solution's become quite complex.

Implemented solution
--------------------

Use stamp files to detect whether a file is up-to-date or not.

In particular:

* When we don't write to a file because the new contents are identical to the
  old contents, we now touch a .stamp file. This stamp file means "the
  accompanying file was determined to be up-to-date when the stamp was
  touched."
* When checking whether a file is up-to-date, also check for the presence of a
  .stamp file, and if it exists, use the highest timestamp between the stamp
  file and the actual file.

Now the test scenario becomes:

* 1st build: everything is new and everything is built.
* 2nd build: contents of .exe changes, the linker runs again, the static
  registrar runs again, but sees that the generated output didn't change, so
  it doesn't write the new content to disk, but it creates a registrar.m.stamp
  file to indicate the point in time when registrar.m was considered up-to-
  date.
* 3rd build: only the .exe timestamp changes, the linker sees nothing changes
  in the contents of the .exe and loads the previously linked assemblies from
  disk, the static registrar sees that the .exe's timestamp is *older* than
  registrar.m.stamp's timestamp and doesn't run again.

We only use the stamp file for source code (registrar.[m|h], main.[m|h],
pinvokes.[m|h]), since using it every time has too much potential for running
into other problems (for instance we should never create .stamp files inside
the .app).

Fixes these test failures:

    1) Failed : Xamarin.MTouch.RebuildTest_WithExtensions("single","",False,System.String[])
      single
      Expected: <empty>
      But was:  < "/Users/builder/data/lanes/5746/4123bf7e/source/xamarin-macios/tests/mtouch/bin/Debug/tmp-test-dir/Xamarin.Tests.BundlerTool.CreateTemporaryDirectory371/testApp.app/testApp is modified, timestamp: 2/15/2018 3:04:11 PM > 2/15/2018 3:04:09 PM" >

    2) Failed : Xamarin.MTouch.RebuildTest_WithExtensions("dual","armv7,arm64",False,System.String[])
      dual
      Expected: <empty>
      But was:  < "/Users/builder/data/lanes/5746/4123bf7e/source/xamarin-macios/tests/mtouch/bin/Debug/tmp-test-dir/Xamarin.Tests.BundlerTool.CreateTemporaryDirectory375/testApp.app/testApp is modified, timestamp: 2/15/2018 3:06:03 PM > 2/15/2018 3:06:00 PM" >

    3) Failed : Xamarin.MTouch.RebuildTest_WithExtensions("llvm","armv7+llvm",False,System.String[])
      llvm
      Expected: <empty>
      But was:  < "/Users/builder/data/lanes/5746/4123bf7e/source/xamarin-macios/tests/mtouch/bin/Debug/tmp-test-dir/Xamarin.Tests.BundlerTool.CreateTemporaryDirectory379/testApp.app/testApp is modified, timestamp: 2/15/2018 3:07:14 PM > 2/15/2018 3:07:12 PM" >

    4) Failed : Xamarin.MTouch.RebuildTest_WithExtensions("debug","",True,System.String[])
      debug
      Expected: <empty>
      But was:  < "/Users/builder/data/lanes/5746/4123bf7e/source/xamarin-macios/tests/mtouch/bin/Debug/tmp-test-dir/Xamarin.Tests.BundlerTool.CreateTemporaryDirectory383/testApp.app/testApp is modified, timestamp: 2/15/2018 3:08:16 PM > 2/15/2018 3:08:13 PM" >

    5) Failed : Xamarin.MTouch.RebuildTest_WithExtensions("single-framework","",False,System.String[])
      single-framework
      Expected: <empty>
      But was:  < "/Users/builder/data/lanes/5746/4123bf7e/source/xamarin-macios/tests/mtouch/bin/Debug/tmp-test-dir/Xamarin.Tests.BundlerTool.CreateTemporaryDirectory387/testApp.app/testApp is modified, timestamp: 2/15/2018 3:09:18 PM > 2/15/2018 3:09:16 PM" >

Fixes https://github.com/xamarin/maccore/issues/641
2018-02-19 20:28:04 +01:00
Rolf Bjarne Kvinge 8d7f951ea3 [mmp] Don't support removal of the dynamic registrar for XM, it needs more work. 2018-02-15 10:24:31 +01:00
Rolf Bjarne Kvinge 92f8fab14b [mtouch/mmp] Add support for inlining calls to Runtime.DynamicRegistrarSupported and removal of the dynamic registrar. 2018-02-15 10:18:27 +01:00
Rolf Bjarne Kvinge 1206d7bf49 [docs] Update according to review. 2018-02-14 01:37:51 +01:00
Rolf Bjarne Kvinge 0fa2aa0fb5 [mtouch/mmp] Add a 'register-protocols' optimization option. 2018-02-12 14:45:21 +01:00
Rolf Bjarne Kvinge 97230c28e1
Optimize calls to BlockLiteral.SetupBlock to inject the block signature. (#3391)
* [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.
2018-02-06 07:08:15 +01:00
Chris Hamons c0202e0e2b
PMCS Removal (#3197)
You were the preprocessor we wished C# had natively

Removing PMCS requires these changes:
* Remove XamCore from src/
* Remove XamCore from tools/
* Remove XamCore from runtime/
* nint/nuint enum conversion
* _compat_ enum conversion
* NSAction conversion
* Hand fix single API incorrectly converted by PMCS to unbreak compatibility
   - Due to a bug in PMCS, the nuint was incorrectly converted in this API.
   - However, as that ship as sailed, we must "fix" it until XAMCORE_4_0
* Update readme
* Bump macios-binaries
2018-02-05 10:26:29 -05:00
Rolf Bjarne Kvinge b2bcad7a94
Add a BindingImpl attribute and use to to teach the linker look for it to search for optimizable code. (#3299)
* [ObjCRuntime] Add a BindingImplAttribute.

* [linker] Make ProviderToString an extension method on ICustomAttributeProvider to make it more discoverable.

* [generator] Use [BindingImpl] instead of [CompilerGenerated].

The entire diff is big (89MB), so it can't be gisted. However, most of it is
either removal of `using System.Runtime.CompilerServices;` or the change from
`[CompilerGenerated]` to `[BindingImpl (...)]` like this:
https://gist.github.com/rolfbjarne/8bfda3ed37b956d0342a1c1e9b079244

If I remove those parts of the diff, there's nothing significant left:
https://gist.github.com/rolfbjarne/4156164d6bdb1376366200394eb8a091

* [linker] Teach the linker about the new [BindingImpl] attribute.

In addition to the existing logic where the linker would optimize some
[CompilerGenerated] code (sometimes with additional requirements), it will now
also optimize all [BindingImpl (Optimizable)] code (without any additional
requirements).

* [tests] Add tests to make sure [BindingImpl (Optimizable)] works as expected.

* [linker] Check for [BindingImpl] before [CompilerGenerated] and stop checking for [CompilerGenerated] in XAMCORE_4_0.

Check for [BindingImpl] before checking for [CompilerGenerated], since the
former is more common.

Also stop checking for [CompilerGenerated] (at least to mean that code is
optimizable) in our next non-compatible evolutionary leap (XAMCORE_4_0):

* [introspection] Impl a better typo check.
2018-01-26 18:38:23 +01:00
Rolf Bjarne Kvinge af03020eef
[mtouch/mmp] Give users more control over optimizations, and share more code between mtouch and mmp. (#3242)
* [mtouch/mmp] Give users more control over optimizations, and share more code between mtouch and mmp.

1. Add an --optimize flag to mtouch/mmp that allows users to select which
   optimizations to apply (or not). This makes it easier to add future
   optimizations, and allow users to disable any optimization that causes
   problems without having to disable many other features.

2. Share as much optimization code as possible between mtouch and mmp. This
   immediately gives a benefit to mmp, which has three new optimizations only
   mtouch had: NSObject.IsDirectBinding inlining, IntPtr.Size inlining and
   dead code elimination.

   This results in ~6kb of disk space saved for a linked Xamarin.Mac app:

   * link sdk: [Debug][1], [Release][2]
   * link all: [Debug][3], [Release][4]

Testing also verifies that monotouchtest ([Debug][5], [Release][6]) has not
changed size at all, which means that no default optimizations have changed
inadvertedly.

[1]: https://gist.github.com/rolfbjarne/6b731e3b5ca6170355662e6505c3d492#link-sdk-mac--debug
[2]: https://gist.github.com/rolfbjarne/6b731e3b5ca6170355662e6505c3d492#link-sdk-mac--release
[3]: https://gist.github.com/rolfbjarne/6b731e3b5ca6170355662e6505c3d492#link-all-mac--debug
[4]: https://gist.github.com/rolfbjarne/6b731e3b5ca6170355662e6505c3d492#link-all-mac--release
[5]: https://gist.github.com/rolfbjarne/6b731e3b5ca6170355662e6505c3d492#monotouchtest-iphonedebug64
[6]: https://gist.github.com/rolfbjarne/6b731e3b5ca6170355662e6505c3d492#monotouchtest-iphonerelease64

* [tools] Don't enable the IsDirectBinding optimization by default for Xamarin.Mac apps, it's not safe.

* Fix whitespace issues.

* [doc] Document optimizations.

* Officially support optimizations by adding them to the Versions.plist.

* [linker] Improve IntPtr.Size inliner + dead code eliminatior and add tests.

* Properly handle operands for the ldc_i4_s instruction (they're sbyte).
* Fix less-than condition to actually do a less-than comparison.
* Make sure to look up the bitness in the Target, not the Application, since
  the Application's value will be incorrect when building fat apps (both
  Is32Build and Is64Build will be true).
* Remove unnecessary checks for the IntPtr.Size inliner: this optimization
  does not depend on other instructions than the IntPtr.get_Size call, so
  remove the checks that verify surrounding instructions. This makes the
  IntPtr.Size inliner kick in in more scenarios (such as the new tests).
* Add tests.

* [tests] Add mmp tests for optimizations.

* [tests] Fix XM optimization tests.

* [tests] Fix test build error.
2018-01-23 11:33:48 +01:00
Rolf Bjarne Kvinge e8d16c925b
[mtouch/mmp/bgen] Add support for response files. (#2808)
* [mtouch/mmp/bgen] Add support for response files.

This is the first part of the fix for #56501.

https://bugzilla.xamarin.com/show_bug.cgi?id=56501

* [tests] Make sure no single argument starting with a '@' is passed to mtouch unless it's a response file.

--assembly-build-target takes arguments starting with '@', for instance:

    --assembly-build-target @all=framework

which does not work anymore, because that's interpreted as a response file
(mtouch tries to read the file '@all=framework', which obviously doesn't
exist).

The fix is simple, don't put a space between the two arguments:

    --assembly-build-target=@all=framework

* Add --root-assembly to mtouch/mmp and make the MSBuild tasks use this new option.

This makes it possible to pass root assemblies starting with `@` to mtouch/mmp
without getting mistaken for response files.

* [msbuild] Always use the command-line option that takes an equals or colon.

Always use the command-line option that takes an equals or colon instead of a
space.

Do either of these:

    --foo=something
    --foo:something

instead of this:

    --foo something

so that `something` can start with an at (`@`) sign without being mistaken for
a response file.

* [msbuild] Fix tests according to recent task changes.
2017-11-16 16:02:34 +01:00
Rolf Bjarne Kvinge 3aabef12dd [mtouch/mmp] Downgrade MT0123 to a verbose log statement instead. (#2701)
* [mtouch/mmp] Downgrade MT0123 to a verbose log statement instead.

It's unlikely to be useful for normal people who've just set LANG for whatever
unrelated reason.

If it's needed to diagnose failures, it'll still show up in verbose logs.

* [docs] Remove MT0123, it's no longer being used, and we never released a version that used it either.

* [tests][mtouch] Update tests according to code changes (MT0123 removal).
2017-09-18 17:14:17 +02:00
Rolf Bjarne Kvinge dbc78103d0 [mmp] Fix symbol name for 32-bit Objective-C classes. Fixes #58861. (#2506)
* [mmp] Fix symbol name for 32-bit Objective-C classes. Fixes #58861.

https://bugzilla.xamarin.com/show_bug.cgi?id=58861

* [tests] Add test case for bug #58861.

https://bugzilla.xamarin.com/show_bug.cgi?id=58861

* [tests] Fix build failure for msbuild and xammac tests.

Fixes this:

> tests/common/mac/ProjectTestHelpers.cs(93,68): error CS0117: 'Driver' does not contain a definition for 'Verbosity'

* [mmptest] Fix build to build MobileBinding.dll as well.

This makes sure tests that need MobileBinding.dll actually have it.
2017-08-24 09:42:08 +02:00
Rolf Bjarne Kvinge af44978cce [mtouch] Print verbosity using an invariant culture. Fixes #58849. (#2507)
* [mtouch/mmp] Set CultureInfo.CurrentCulture according to LANG.

This makes it easier to run mtouch/mmp under different locales when testing.

Unfortunately mono checks the system locale before checking LANG, which means
that there's no built-in way in macOS/mono to specify the current locale
without changing the system locale.

* [mtouch] Print verbosity using an invariant culture. Fixes #58849.

https://bugzilla.xamarin.com/show_bug.cgi?id=58849

* [mtouch/mmp] Fix error code.

* [mtouch/mmp] Log/warn when we set the current language.
2017-08-22 09:40:26 +02:00
Rolf Bjarne Kvinge d17cb6556a [mtouch] Improve how we make sure native symbols aren't stripped away. Fixes #51710 and #54417. (#2162)
* [mtouch] Improve how we make sure native symbols aren't stripped away. Fixes #51710 and #54417.

* Refactor required symbol collection to store more information about each
  symbol (field, function, Objective-C class), and in general make the code
  more straight forward.
* Implement support for generating source code that references these symbols,
  and do this whenever we can't ask the native linker to keep these symbols
  (when using bitcode). Additionally make it possible to do this manually, so
  that the source code can be generated for non-bitcode platforms too (which
  is useful if the number of symbols is enormous, in which case we might
  surpass the maximum command-line length).
* Also make it possible to completely ignore native symbols, or ignore them on
  a per-symbol basis. This provides a fallback for users if we get something
  right and we try to preserve something that shouldn't be preserved (for
  instance if it doesn't exist), and the user ends up with unfixable linker
  errors.
* Don't collect Objective-C classes unless they're in an assembly with
  LinkWith attributes. We don't need to preserve Objective-C classes in any
  other circumstances.
* Implement everything for both Xamarin.iOS and Xamarin.Mac, and share the
  code between them.
* Remove previous workaround for bug #51710, since it's no longer needed.
* Add tests.

https://bugzilla.xamarin.com/show_bug.cgi?id=54417
https://bugzilla.xamarin.com/show_bug.cgi?id=51710

* [mtouch] Make sure to only keep symbols from the current app when code sharing.

This fixes a build problem with the interdependent-binding-projects test when
testing in Today Extension mode.
2017-06-02 18:29:19 +02:00