GlobalizationNative_LoadICUData never called when using Invariant mode (Mac Catalyst and other Apple platforms) #2759
Description
Description
The problem occurs on Apple platforms (Mac Catalyst, iOS) when using .NET 7.
The initial symptom I get is this exception at startup:
Arg_ExternalException (System.Runtime.InteropServices.ExternalException)
at System.Globalization.CompareInfo.SortHandleCache.GetCachedSortHandle(String )
at System.Globalization.CompareInfo.IcuInitSortHandle(String )
at System.Globalization.CompareInfo.InitSort(CultureInfo )
at System.Globalization.CompareInfo..ctor(CultureInfo )
at System.Globalization.CultureInfo.get_CompareInfo()
at System.Globalization.CompareInfo..cctor()
Debugging in lldb shows that this occurs due to an error in ICU, the udata_openChoice function returns an error here:
(lldb) bt
* thread dotnet/runtime#1, name = 'tid_103', queue = 'com.apple.main-thread', stop reason = breakpoint 11.1
* frame #0: 0x00000001015860e7 libmonosgen-2.0.dylib`udata_openChoice
frame dotnet/runtime#1: 0x000000010167272e libmonosgen-2.0.dylib`icu::CollationRoot::load(UErrorCode&) + 118
frame dotnet/runtime#2: 0x000000010164d871 libmonosgen-2.0.dylib`icu::umtx_initOnce(icu::UInitOnce&, void (*)(UErrorCode&), UErrorCode&) + 49
frame dotnet/runtime#3: 0x0000000101672815 libmonosgen-2.0.dylib`icu::CollationRoot::getRootCacheEntry(UErrorCode&) + 31
frame dotnet/runtime#4: 0x00000001016600f0 libmonosgen-2.0.dylib`icu::CollationLoader::loadTailoring(icu::Locale const&, UErrorCode&) + 46
frame dotnet/runtime#5: 0x000000010165d070 libmonosgen-2.0.dylib`icu::Collator::makeInstance(icu::Locale const&, UErrorCode&) + 18
frame dotnet/runtime#6: 0x000000010165d198 libmonosgen-2.0.dylib`icu::Collator::createInstance(icu::Locale const&, UErrorCode&) + 138
frame dotnet/runtime#7: 0x0000000101660fcc libmonosgen-2.0.dylib`ucol_open + 74
frame dotnet/runtime#8: 0x00000001013d0fea libmonosgen-2.0.dylib`GlobalizationNative_GetSortHandle + 74
Debugging a bit more reveals that GlobalizationNative_LoadICUData is never called, and I'm guessing this is the underlying cause for the exceptions above.
Now the question obviously becomes why GlobalizationNative_LoadICUData is never called.
Usually GlobalizationNative_LoadICUData is called like this (for another test app that works fine):
(lldb) monobt
frame #0: 0x0000000101159ac0 libmonosgen-2.0.dylib`GlobalizationNative_LoadICUData
frame dotnet/runtime#1: 0x1009e8140 (wrapper managed-to-native) Interop/Globalization:LoadICUData (string) [{0x11916b828} + 0xf0] (0x1009e8050 0x1009e8203) [0x600002109180 - MonoTouch]
frame dotnet/runtime#2: 0x1009e800b System.Globalization.GlobalizationMode:LoadICU () [{0x11916a808} + 0x7b] (0x1009e7f90 0x1009e8011) [0x600002109180 - MonoTouch]
frame dotnet/runtime#3: 0x1009e7453 System.Globalization.GlobalizationMode/Settings:.cctor () [{0x11916a2c0} + 0x113] (0x1009e7340 0x1009e747d) [0x600002109180 - MonoTouch]
frame dotnet/runtime#4: 0x1009aa4c6 (wrapper runtime-invoke) object:runtime_invoke_void (object,intptr,intptr,intptr) [{0x101887c88} + 0xa6] (0x1009aa420 0x1009aa5a8) [0x600002109180 - MonoTouch]
frame dotnet/runtime#5: 0x0000000101169efb libmonosgen-2.0.dylib`mono_jit_runtime_invoke + 2395
frame dotnet/runtime#6: 0x0000000101086a6f libmonosgen-2.0.dylib`mono_runtime_try_invoke + 143
frame dotnet/runtime#7: 0x0000000101085516 libmonosgen-2.0.dylib`mono_runtime_class_init_full + 886
frame dotnet/runtime#8: 0x00000001011617ca libmonosgen-2.0.dylib`mono_jit_compile_method_inner + 1178
frame dotnet/runtime#9: 0x0000000101165d37 libmonosgen-2.0.dylib`jit_compile_method_with_opt + 2679
frame dotnet/runtime#10: 0x000000010116519a libmonosgen-2.0.dylib`mono_jit_compile_method + 58
frame dotnet/runtime#11: 0x00000001012130b9 libmonosgen-2.0.dylib`common_call_trampoline + 1273
frame dotnet/runtime#12: 0x0000000101212b70 libmonosgen-2.0.dylib`mono_magic_trampoline + 96
frame dotnet/runtime#13: 0x100835396<0x100835396 - generic_trampoline_jit trampoline>
frame dotnet/runtime#14: 0x1009e72e3 System.Globalization.GlobalizationMode:get_Invariant () [{0x11916a150} + 0x33] (0x1009e72b0 0x1009e72e5) [0x600002109180 - MonoTouch]
frame dotnet/runtime#15: 0x1009e6f23 System.Globalization.CultureData:CreateCultureWithInvariantData () [{0x119165778} + 0xed3] (0x1009e6050 0x1009e71e8) [0x600002109180 - MonoTouch]
frame dotnet/runtime#16: 0x1009e4ef3 System.Globalization.CultureData:get_Invariant () [{0x119164f40} + 0x53] (0x1009e4ea0 0x1009e4f0f) [0x600002109180 - MonoTouch]
frame dotnet/runtime#17: 0x1009e4dcb System.Globalization.CultureInfo:.cctor () [{0x119164818} + 0x3b] (0x1009e4d90 0x1009e4e1e) [0x600002109180 - MonoTouch]
frame dotnet/runtime#18: 0x1009aa4c6 (wrapper runtime-invoke) object:runtime_invoke_void (object,intptr,intptr,intptr) [{0x101887c88} + 0xa6] (0x1009aa420 0x1009aa5a8) [0x600002109180 - MonoTouch]
frame dotnet/runtime#19: 0x0000000101169efb libmonosgen-2.0.dylib`mono_jit_runtime_invoke + 2395
frame dotnet/runtime#20: 0x0000000101086a6f libmonosgen-2.0.dylib`mono_runtime_try_invoke + 143
frame dotnet/runtime#21: 0x0000000101085516 libmonosgen-2.0.dylib`mono_runtime_class_init_full + 886
frame dotnet/runtime#22: 0x0000000101190a16 libmonosgen-2.0.dylib`mono_method_to_ir + 104182
frame dotnet/runtime#23: 0x000000010115e99d libmonosgen-2.0.dylib`mini_method_compile + 3821
frame dotnet/runtime#24: 0x000000010116136f libmonosgen-2.0.dylib`mono_jit_compile_method_inner + 63
frame dotnet/runtime#25: 0x0000000101165d37 libmonosgen-2.0.dylib`jit_compile_method_with_opt + 2679
frame dotnet/runtime#26: 0x000000010116519a libmonosgen-2.0.dylib`mono_jit_compile_method + 58
frame dotnet/runtime#27: 0x00000001012130b9 libmonosgen-2.0.dylib`common_call_trampoline + 1273
frame dotnet/runtime#28: 0x0000000101212b70 libmonosgen-2.0.dylib`mono_magic_trampoline + 96
frame dotnet/runtime#29: 0x100835396<0x100835396 - generic_trampoline_jit trampoline>
frame dotnet/runtime#30: 0x1009e4d63 System.Globalization.CompareInfo:.cctor () [{0x119164e28} + 0x33] (0x1009e4d30 0x1009e4d81) [0x600002109180 - MonoTouch]
frame dotnet/runtime#31: 0x1009aa4c6 (wrapper runtime-invoke) object:runtime_invoke_void (object,intptr,intptr,intptr) [{0x101887c88} + 0xa6] (0x1009aa420 0x1009aa5a8) [0x600002109180 - MonoTouch]
frame dotnet/runtime#32: 0x0000000101169efb libmonosgen-2.0.dylib`mono_jit_runtime_invoke + 2395
frame dotnet/runtime#33: 0x0000000101086a6f libmonosgen-2.0.dylib`mono_runtime_try_invoke + 143
frame dotnet/runtime#34: 0x0000000101085516 libmonosgen-2.0.dylib`mono_runtime_class_init_full + 886
frame dotnet/runtime#35: 0x0000000101190a16 libmonosgen-2.0.dylib`mono_method_to_ir + 104182
frame dotnet/runtime#36: 0x000000010115e99d libmonosgen-2.0.dylib`mini_method_compile + 3821
frame dotnet/runtime#37: 0x000000010116136f libmonosgen-2.0.dylib`mono_jit_compile_method_inner + 63
frame dotnet/runtime#38: 0x0000000101165d37 libmonosgen-2.0.dylib`jit_compile_method_with_opt + 2679
frame dotnet/runtime#39: 0x000000010116519a libmonosgen-2.0.dylib`mono_jit_compile_method + 58
frame dotnet/runtime#40: 0x00000001012130b9 libmonosgen-2.0.dylib`common_call_trampoline + 1273
frame dotnet/runtime#41: 0x0000000101212b70 libmonosgen-2.0.dylib`mono_magic_trampoline + 96
frame dotnet/runtime#42: 0x100835396<0x100835396 - generic_trampoline_jit trampoline>
frame dotnet/runtime#43: 0x1009e4cd3 string:StartsWith (string) [{0x1018baa80} + 0x53] (0x1009e4c80 0x1009e4d13) [0x600002109180 - MonoTouch]
frame dotnet/runtime#44: 0x1009e4abb ObjCRuntime.Runtime:GetIsARM64CallingConvention () [{0x119061c48} + 0x6b] (0x1009e4a50 0x1009e4abd) [0x600002109180 - MonoTouch]
frame dotnet/runtime#45: 0x1009b390b ObjCRuntime.Runtime:Initialize (ObjCRuntime.Runtime/InitializationOptions*) [{0x119013508} + 0x30b] (0x1009b3600 0x1009b3a13) [0x600002109180 - MonoTouch]
frame dotnet/runtime#46: 0x1009b3b91 (wrapper runtime-invoke) <Module>:runtime_invoke_void_Runtime/InitializationOptions* (object,intptr,intptr,intptr) [{0x119061a80} + 0xb1] (0x1009b3ae0 0x1009b3c78) [0x600002109180 - MonoTouch]
frame dotnet/runtime#47: 0x0000000101169efb libmonosgen-2.0.dylib`mono_jit_runtime_invoke + 2395
frame dotnet/runtime#48: 0x0000000101086a6f libmonosgen-2.0.dylib`mono_runtime_try_invoke + 143
frame dotnet/runtime#49: 0x0000000101088dff libmonosgen-2.0.dylib`mono_runtime_invoke + 95
frame dotnet/runtime#50: 0x0000000100a37c0e libxamarin-dotnet-debug.dylib`xamarin_bridge_call_runtime_initialize(options=0x0000000100a4b9f0, exception_gchandle=0x00007ff7bfeff1f0) at monovm-bridge.m:147:2
frame dotnet/runtime#51: 0x0000000100a2a87c libxamarin-dotnet-debug.dylib`xamarin_initialize at runtime.m:1302:2
frame dotnet/runtime#52: 0x0000000100a3dbe1 libxamarin-dotnet-debug.dylib`xamarin_main(argc=1, argv=0x00007ff7bfeff448, launch_mode=XamarinLaunchModeApp) at monotouch-main.m:438:2
frame dotnet/runtime#53: 0x00000001000aafc4 BundleStructure`main(argc=1, argv=0x00007ff7bfeff448) at main.x86_64.mm:62:11
frame dotnet/runtime#54: 0x00000001004e551e dyld`start + 462
So I traced all managed code (setting MONO_TRACE=all): iTerm2 Session 20 Apr 2022 at 6:28:03 PM.txt.zip
And I found that:
System.Globalization.GlobalizationMode/Settings:.cctoris never called.System.Globalization.GlobalizationMode:get_Invariantis never called.- However,
System.Globalization.CultureData:CreateCultureWithInvariantDatais called.
Then I compared the IL for System.Globalization.CultureData:CreateCultureWithInvariantData between a working app and a failing app, and it turns out there's no call to System.Globalization.GlobalizationMode:get_Invariant in the failing app.
I'm guessing the linker linked it away.
App that fails: BundleStructure.app.zip - download, unzip, and execute ./BundleStructure.app/Contents/MacOS/BundleStructure in Terminal to see the exception (due to a different issue on our side the app ends up in an infinite loop, but this is the cause for the loop in the first place).
Note: this is not a problem in .NET 6, only in .NET 7.
Reproduction Steps
If the above description isn't enough, I can try to find a way to reproduce it.
Expected behavior
No exception at startup
Actual behavior
See above
Regression?
Yes.
This started happened when maestro did this bump: dotnet/macios@d9eacac.
Known Workarounds
No response
Configuration
No response
Other information
No response