[android] build and ship libmono-profiler-aot.so #57511
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jonathanpeppers
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lambdageek and
marek-safar
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lambdageek
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Aug 16, 2021
Context: xamarin/xamarin-android#6171 Fixes: dotnet#56989 In order for the Android workload to be able to record `.aotprof`/`.aotprofile` files, we need `libmono-profiler-aot.so` to be available. Down the road this feature could be provided by the Mono diagnostics component, but will probably not happen in .NET 6. These changes build `libmono-profiler-aot.so` for Android, and includes it in the `Microsoft.NETCore.App.Runtime.Mono.android-*` runtime packs. In the Android workload's MSBuild targets we exclude this native library unless the app is configured to record an AOT profile. I also included in `CMakeLists.txt`: target_compile_definitions(mono-profiler-aot PRIVATE -DMONO_DLL_EXPORT) Otherwise, the AOT profiler cannot be loaded: 08-12 16:01:39.817 3003 3003 I monodroid-assembly: Trying to load shared library '/data/app/com.microsoft.net6.helloandroid-4u8tNHoPAh4zSZMaf2FsnA==/lib/x86_64/libmono-profiler-aot.so' 08-12 16:01:39.818 3003 3003 W monodroid: Looking for profiler init symbol 'mono_profiler_init_aot'? 0x0 08-12 16:01:39.818 3003 3003 W monodroid: The 'aot' profiler wasn't found in the main executable nor could it be loaded from 'libmono-profiler-aot.so'. With these changes, I can successfully record an AOT profile on Android: Reading from '127.0.0.1:9999'... Read 4096 bytes... ... Read 2671 bytes... Read total 72303 bytes... Summary: Modules: 8 Types: 197 Methods: 910 Going to write the profile to 'custom.aprof' When using the profile, I get improved startup times: 08-12 16:56:33.940 1624 1874 I ActivityTaskManager: Displayed com.microsoft.net6.helloandroid/crc6490bfc84a0f5dff7a.MainActivity: +217ms
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akoeplinger
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Aug 16, 2021
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Is there a build artifact I can double-check the contents of the I tried to find it, but there are 100+ artifacts. |
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Closing this, as we've gone the route of not supporting custom profiles in .NET 6. In some future release, support for custom profiles with the To record a profile now, I've setup a repo: https://github.com/jonathanpeppers/android-profiled-aot We setup premade profiles for |
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Context: xamarin/xamarin-android#6171
Fixes: #56989
In order for the Android workload to be able to record
.aotprof/.aotprofilefiles, we needlibmono-profiler-aot.soto be available. Down the road this feature could be provided by the
Mono diagnostics component, but will probably not happen in .NET 6.
These changes build
libmono-profiler-aot.sofor Android, and includesit in the
Microsoft.NETCore.App.Runtime.Mono.android-*runtime packs.In the Android workload's MSBuild targets we exclude this native library
unless the app is configured to record an AOT profile.
I also included in
CMakeLists.txt:Otherwise, the AOT profiler cannot be loaded:
With these changes, I can successfully record an AOT profile on Android:
When using the profile, I get improved startup times: