[xaprepare] Update ExternalGitDependency usage #2

pjcollins · 2019-06-06T17:58:15Z

Allows a non-authorized https-based clone for local use cases, and cleans
up various logging events to ensure we don't leak secrets. Also includes
some minor azure-pipelines.yaml cleanup.

Allows a non-authorized https-based clone for local use cases, and cleans up various logging events to ensure we don't leak secrets. Also includes some minor azure-pipelines.yaml cleanup.

When using fastdev typemaps files we get the following error: F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0 in tid 5802 (haredandroidios), pid 5802 (haredandroidios) I crash_dump32: obtaining output fd from tombstoned, type: kDebuggerdTombstone I /system/bin/tombstoned: received crash request for pid 5802 I crash_dump32: performing dump of process 5802 (target tid = 5802) F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** F DEBUG : Build fingerprint: 'Android/sdk_phone_x86/generic_x86:9/PSR1.180720.012/4923214:userdebug/test-keys' F DEBUG : Revision: '0' F DEBUG : ABI: 'x86' F DEBUG : pid: 5802, tid: 5802, name: haredandroidios >>> com.xamarin.blankformssharedandroidios <<< F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0 F DEBUG : Cause: null pointer dereference F DEBUG : eax 00000000 ebx e6b2e754 ecx 00000000 edx 00000000 F DEBUG : edi e0cc58f0 esi 00000000 F DEBUG : ebp ffd85ff8 esp ffd85fcc eip e6a60532 F DEBUG : F DEBUG : backtrace: F DEBUG : #00 pc 0001e532 /system/lib/libc.so (strlen+18) F DEBUG : #1 pc 00075952 /system/lib/libc.so (strdup+34) F DEBUG : #2 pc 0000f6ab /data/app/com.xamarin.blankformssharedandroidios-nCq7hL5Bz-TYILJl3W97zw==/lib/x86/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::add_type_mapping(xamarin::android::internal::TypeMappingInfo**, char const*, char const*, char const*)+667) F DEBUG : #3 pc 00010ed7 /data/app/com.xamarin.blankformssharedandroidios-nCq7hL5Bz-TYILJl3W97zw==/lib/x86/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::try_load_typemaps_from_directory(char const*)+871) F DEBUG : dotnet#4 pc 000233b8 /data/app/com.xamarin.blankformssharedandroidios-nCq7hL5Bz-TYILJl3W97zw==/lib/x86/libmonodroid.so (gather_bundled_assemblies(_JNIEnv*, xamarin::android::jstring_array_wrapper&, bool, int*)+248) F DEBUG : dotnet#5 pc 000229c6 /data/app/com.xamarin.blankformssharedandroidios-nCq7hL5Bz-TYILJl3W97zw==/lib/x86/libmonodroid.so (create_domain(_JNIEnv*, _jclass*, xamarin::android::jstring_array_wrapper&, _jstring*, _jobject*, bool)+166) F DEBUG : dotnet#6 pc 0001f20c /data/app/com.xamarin.blankformssharedandroidios-nCq7hL5Bz-TYILJl3W97zw==/lib/x86/libmonodroid.so (create_and_initialize_domain(_JNIEnv*, _jclass*, xamarin::android::jstring_array_wrapper&, _jobjectArray*, _jobject*, bool)+204) F DEBUG : dotnet#7 pc 0001c7af /data/app/com.xamarin.blankformssharedandroidios-nCq7hL5Bz-TYILJl3W97zw==/lib/x86/libmonodroid.so (Java_mono_android_Runtime_init+4255) The was down to the `try_load_typemaps_from_directory()` passing a `nullptr` to the `add_type_mapping()` method. This method was calling **strdup**(3), which does NOT like `nullptr`. Since the `source_entry` argument is only used for logging we might as well create a constant string with a value of `.__override__` so that if there is a problem we can see from the logs this was a fastdev issue.

Context: 7117414 7117414 introduced native code which queries the Mono runtime to obtain an instance of `MonoClass` for a given `MonoReflectionType` as well as the `MonoImage` associated with the class. However, it appears that in certain cases the class pointer stored `MonoReflectionType` doesn't lead us to getting a valid `MonoImage` instance, causing a segfault similar to: 04-08 15:52:55.015 19030 19030 F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3000021 in tid 19030 (s.swipeviewdemo), pid 19030 (s.swipeviewdemo) 04-08 15:52:55.037 19061 19061 I crash_dump32: obtaining output fd from tombstoned, type: kDebuggerdTombstone 04-08 15:52:55.037 1834 1834 I /system/bin/tombstoned: received crash request for pid 19030 04-08 15:52:55.038 19061 19061 I crash_dump32: performing dump of process 19030 (target tid = 19030) 04-08 15:52:55.042 19061 19061 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 04-08 15:52:55.042 19061 19061 F DEBUG : Build fingerprint: 'google/sdk_gphone_x86/generic_x86:10/QSR1.191030.002/5978551:userdebug/dev-keys' 04-08 15:52:55.043 19061 19061 F DEBUG : Revision: '0' 04-08 15:52:55.043 19061 19061 F DEBUG : ABI: 'x86' 04-08 15:52:55.043 19061 19061 F DEBUG : Timestamp: 2020-04-08 15:52:55+0200 04-08 15:52:55.043 19061 19061 F DEBUG : pid: 19030, tid: 19030, name: s.swipeviewdemo >>> nl.versluis.swipeviewdemo <<< 04-08 15:52:55.043 19061 19061 F DEBUG : uid: 10135 04-08 15:52:55.043 19061 19061 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3000021 04-08 15:52:55.043 19061 19061 F DEBUG : eax 03000005 ebx cb9f4d24 ecx 7191c13b edx 00000004 04-08 15:52:55.043 19061 19061 F DEBUG : edi 03000005 esi ffb22080 04-08 15:52:55.043 19061 19061 F DEBUG : ebp ffb22108 esp ffb2206c eip cbcfc1e4 04-08 15:52:55.077 19061 19061 F DEBUG : 04-08 15:52:55.077 19061 19061 F DEBUG : backtrace: 04-08 15:52:55.077 19061 19061 F DEBUG : #00 pc 001b41e4 /data/app/Mono.Android.DebugRuntime-umHhDz421s4-tshrHwha0w==/lib/x86/libmonosgen-32bit-2.0.so (mono_image_get_name+4) 04-08 15:52:55.077 19061 19061 F DEBUG : #1 pc 0000cac7 /data/app/nl.versluis.swipeviewdemo-jCFH_bcCNuFx1tLUhaJ4nw==/lib/x86/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(_MonoType*, _MonoClass*, unsigned char const*)+263) (BuildId: a2585ad379f788049e463af58c8686e9cdc1e778) 04-08 15:52:55.077 19061 19061 F DEBUG : #2 pc 0000c8cc /data/app/nl.versluis.swipeviewdemo-jCFH_bcCNuFx1tLUhaJ4nw==/lib/x86/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(_MonoReflectionType*, unsigned char const*)+124) (BuildId: a2585ad379f788049e463af58c8686e9cdc1e778) 04-08 15:52:55.077 19061 19061 F DEBUG : #3 pc 0001621a /data/app/nl.versluis.swipeviewdemo-jCFH_bcCNuFx1tLUhaJ4nw==/lib/x86/libmonodroid.so (xamarin::android::internal::MonodroidRuntime::typemap_managed_to_java(_MonoReflectionType*, unsigned char const*)+42) (BuildId: a2585ad379f788049e463af58c8686e9cdc1e778) 04-08 15:52:55.077 19061 19061 F DEBUG : dotnet#4 pc 000325af <anonymous:c7858000> Investigating the issue I discovered that one of two things happened: 1. the returned `MonoImage` instance was invalid, or 2. the instance was valid but image name stored in `MonoImage` was `null` In case of 1. I would see something similar to this in the crash log: 04-08 15:52:55.015 19030 19030 I monodroid: const char *xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(MonoType *, MonoClass *, const uint8_t *) 04-08 15:52:55.015 19030 19030 I monodroid: type == 0xc6e60d3c, klass == 0xc6e60cb8, mvid == 0xc8c02d90 04-08 15:52:55.015 19030 19030 I monodroid: type name == Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[Xamarin.Forms.Page] 04-08 15:52:55.015 19030 19030 I monodroid: calling mono_class_get_image (0xc6e60cb8) 04-08 15:52:55.015 19030 19030 I monodroid: image == 0x3000005 It would happen in 32-bit builds only, the 64-bit builds would lead to a different issue, the 2. above: 04-08 16:05:13.446 28985 28985 I monodroid: const char *xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(MonoType *, MonoClass *, const uint8_t *) 04-08 16:05:13.447 28985 28985 I monodroid: type == 0x7ce3fecc78, klass == 0x7ce3fecb98, mvid == 0x7ce9404520 04-08 16:05:13.447 28985 28985 I monodroid: type name == Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[Xamarin.Forms.Page] 04-08 16:05:13.447 28985 28985 I monodroid: calling mono_class_get_image (0x7ce3fecb98) 04-08 16:05:13.447 28985 28985 I monodroid: image == 0x7ce3fecbc8 04-08 16:05:13.447 28985 28985 I monodroid: image_name == <null> Case 1. would result in a segfault inside the `mono_image_get_name` call, because the pointer value was clearly invalid, while case 2. would result in a crash inside `strlen` which was passed a `null` pointer. I found out that the root cause was in the `mono_type_get_class` call which is supposed to be used with great caution as it eventually calls the `mono_type_get_class_internal` function which is supposed to be called only for object types `MONO_TYPE_CLASS` and `MONO_TYPE_VALUETYPE` but not `MONO_TYPE_GENERICINST` type which is precisely the type that caused the crash. The fix is to call the `mono_class_from_mono_type` function instead which, albeit slower, is safer and works correctly in all cases. Fixing this led to the next issue, a managed exception thrown after the runtime failed to map managed type name to Java type name: 04-08 18:08:58.886 30726 30726 W monodroid-assembly: typemap: unable to find mapping to a Java type from managed type 'Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[T], Xamarin.Forms.Platform.Android' 04-08 18:08:58.886 30726 30726 I monodroid-timing: Typemap.managed_to_java: end, total time; elapsed: 0s:0::33177 04-08 18:08:58.888 30726 30726 D Mono : DllImport attempting to load: '/system/lib64/liblog.so'. 04-08 18:08:58.889 30726 30726 D Mono : DllImport loaded library '/system/lib64/liblog.so'. 04-08 18:08:58.889 30726 30726 D Mono : DllImport searching in: '/system/lib64/liblog.so' ('/system/lib64/liblog.so'). 04-08 18:08:58.889 30726 30726 D Mono : Searching for '__android_log_print'. 04-08 18:08:58.889 30726 30726 D Mono : Probing '__android_log_print'. 04-08 18:08:58.889 30726 30726 D Mono : Found as '__android_log_print'. 04-08 18:08:58.891 30726 30726 I MonoDroid: UNHANDLED EXCEPTION: 04-08 18:08:58.899 30726 30726 I MonoDroid: System.NotSupportedException: Cannot create instance of type 'Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[[Xamarin.Forms.Page, Xamarin.Forms.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null]]': no Java peer type found. 04-08 18:08:58.899 30726 30726 I MonoDroid: at Java.Interop.JniPeerMembers+JniInstanceMethods..ctor (System.Type declaringType) [0x0004b] in <514e1249792e47a180b3f1293306b972>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Java.Interop.JniPeerMembers+JniInstanceMethods.GetConstructorsForType (System.Type declaringType) [0x00031] in <514e1249792e47a180b3f1293306b972>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Java.Interop.JniPeerMembers+JniInstanceMethods.StartCreateInstance (System.String constructorSignature, System.Type declaringType, Java.Interop.JniArgumentValue* parameters) [0x00038] in <514e1249792e47a180b3f1293306b972>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Android.Support.V4.App.FragmentPagerAdapter..ctor (Android.Support.V4.App.FragmentManager fm) [0x0005b] in <fefee6c2c695459088a9df092723e052>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[T]..ctor (Xamarin.Forms.MultiPage`1[T] page, Android.Support.V4.App.FragmentManager fragmentManager) [0x00000] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.TabbedPageRenderer.CreateFormsViewPager (Android.Content.Context context, Xamarin.Forms.TabbedPage tabbedPage) [0x00033] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.TabbedPageRenderer.OnElementChanged (Xamarin.Forms.Platform.Android.ElementChangedEventArgs`1[TElement] e) [0x001cd] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].SetElement (TElement element) [0x000c0] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Xamarin.Forms.Platform.Android.IVisualElementRenderer.SetElement (Xamarin.Forms.VisualElement element) [0x00033] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.Platform.CreateRenderer (Xamarin.Forms.VisualElement element, Android.Content.Context context) [0x0001f] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.Platform.AddChild (Xamarin.Forms.Page page, System.Boolean layout) [0x0000d] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.Platform.SetPageInternal (Xamarin.Forms.Page newRoot) [0x00061] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.Platform.SetPage (Xamarin.Forms.Page newRoot) [0x000e6] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.FormsAppCompatActivity.InternalSetPage (Xamarin.Forms.Page page) [0x0003f] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.FormsAppCompatActivity.SetMainPage () [0x0000c] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Xamarin.Forms.Platform.Android.FormsAppCompatActivity.LoadApplication (Xamarin.Forms.Application application) [0x00140] in <9d12bb15abb54c508c4bee636d1b3a42>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at SwipeViewDemo.Droid.MainActivity.OnCreate (Android.OS.Bundle savedInstanceState) [0x00035] in <15e30af50bb64ff6b6d20ac6fd546763>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at Android.App.Activity.n_OnCreate_Landroid_os_Bundle_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_savedInstanceState) [0x0000f] in <515e813169e54876823978ab785f569a>:0 04-08 18:08:58.899 30726 30726 I MonoDroid: at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.7(intptr,intptr,intptr) Note that the type name as seen by the native code (via `mono_get_type_name_full`) is `Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[T], Xamarin.Forms.Platform.Android` while we should be looking for `Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1` instead. The discrepancy was caused by calling `mono_get_type_name_full` with its format parameter set to `MONO_TYPE_NAME_FORMAT_REFLECTION`, while what we needed to do is to pass it the format value of `MONO_TYPE_NAME_FORMAT_FULL_NAME` which this commit implements.

Context: https://github.com/jfversluis/SwipeViewDemo Context: https://github.com/xamarin/Xamarin.Forms/blob/fa33ca3b3ac5c7c875023db785b56c67015e13b1/Xamarin.Forms.Platform.Android/AppCompat/TabbedPageRenderer.cs#L512 Commit 7117414 introduced native code which queries the Mono runtime to obtain an instance of a `MonoClass` for a given `MonoReflectionType` as well as the `MonoImage` associated with the `MonoClass`: // EmbeddedAssemblies::typemap_managed_to_java(MonoReflectionType *reflection_type, const uint8_t *mvid) MonoReflectionType *reflection_type = … MonoType *type = mono_reflection_type_get_type (reflection_type); MonoClass *klass = mono_type_get_class (type); // PROBLEMATIC // EmbeddedAssemblies::typemap_managed_to_java(MonoType *type, MonoClass *klass, const uint8_t *mvid) MonoImage *image = mono_class_get_image (klass); However, it appears that when dealing with closed generic types -- such as with `new GenericHolder<int>()` -- the above call chain results in a SIGSEGV instead of a valid `MonoImage*`: F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3000021 in tid 19030 (s.swipeviewdemo), pid 19030 (s.swipeviewdemo) I crash_dump32: obtaining output fd from tombstoned, type: kDebuggerdTombstone I /system/bin/tombstoned: received crash request for pid 19030 I crash_dump32: performing dump of process 19030 (target tid = 19030) F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** F DEBUG : Build fingerprint: 'google/sdk_gphone_x86/generic_x86:10/QSR1.191030.002/5978551:userdebug/dev-keys' F DEBUG : Revision: '0' F DEBUG : ABI: 'x86' F DEBUG : Timestamp: 2020-04-08 15:52:55+0200 F DEBUG : pid: 19030, tid: 19030, name: s.swipeviewdemo >>> nl.versluis.swipeviewdemo <<< F DEBUG : uid: 10135 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3000021 F DEBUG : eax 03000005 ebx cb9f4d24 ecx 7191c13b edx 00000004 F DEBUG : edi 03000005 esi ffb22080 F DEBUG : ebp ffb22108 esp ffb2206c eip cbcfc1e4 F DEBUG : F DEBUG : backtrace: F DEBUG : #00 pc 001b41e4 /data/app/Mono.Android.DebugRuntime-umHhDz421s4-tshrHwha0w==/lib/x86/libmonosgen-32bit-2.0.so (mono_image_get_name+4) F DEBUG : #1 pc 0000cac7 /data/app/nl.versluis.swipeviewdemo-jCFH_bcCNuFx1tLUhaJ4nw==/lib/x86/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(_MonoType*, _MonoClass*, unsigned char const*)+263) (BuildId: a2585ad379f788049e463af58c8686e9cdc1e778) F DEBUG : #2 pc 0000c8cc /data/app/nl.versluis.swipeviewdemo-jCFH_bcCNuFx1tLUhaJ4nw==/lib/x86/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(_MonoReflectionType*, unsigned char const*)+124) (BuildId: a2585ad379f788049e463af58c8686e9cdc1e778) F DEBUG : #3 pc 0001621a /data/app/nl.versluis.swipeviewdemo-jCFH_bcCNuFx1tLUhaJ4nw==/lib/x86/libmonodroid.so (xamarin::android::internal::MonodroidRuntime::typemap_managed_to_java(_MonoReflectionType*, unsigned char const*)+42) (BuildId: a2585ad379f788049e463af58c8686e9cdc1e778) F DEBUG : dotnet#4 pc 000325af <anonymous:c7858000> Investigating the issue I discovered that one of two things happened: 1. the returned `MonoImage` instance was invalid, *or* 2. the instance was valid but image name stored in `MonoImage` was `null` (1) would only happen in 32-bit builds, resulting in a SIGSEGV within `mono_image_get_name()`, because the `image` pointer value of 0x3000005 was invalid: I monodroid: const char *xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(MonoType *, MonoClass *, const uint8_t *) I monodroid: type == 0xc6e60d3c, klass == 0xc6e60cb8, mvid == 0xc8c02d90 I monodroid: type name == Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[Xamarin.Forms.Page] I monodroid: calling mono_class_get_image (0xc6e60cb8) I monodroid: image == 0x3000005 (2) only happened in 64-bit builds, resulting in a SIGSEGV as `strlen()` was passed a `null` pointer: I monodroid: const char *xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(MonoType *, MonoClass *, const uint8_t *) I monodroid: type == 0x7ce3fecc78, klass == 0x7ce3fecb98, mvid == 0x7ce9404520 I monodroid: type name == Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[Xamarin.Forms.Page] I monodroid: calling mono_class_get_image (0x7ce3fecb98) I monodroid: image == 0x7ce3fecbc8 I monodroid: image_name == <null> I found out that the root cause was in the `mono_type_get_class()` call which is supposed to be used with great caution as it eventually calls the `mono_type_get_class_internal()` function which is supposed to be called only for object types `MONO_TYPE_CLASS` and `MONO_TYPE_VALUETYPE` but not `MONO_TYPE_GENERICINST`, and `MONO_TYPE_GENERICINST` is used for closed generic types. The fix is to call the `mono_class_from_mono_type()` function instead which, albeit slower, is safer and works correctly in all cases: // EmbeddedAssemblies::typemap_managed_to_java(MonoReflectionType *reflection_type, const uint8_t *mvid) MonoReflectionType *reflection_type = … MonoType *type = mono_reflection_type_get_type (reflection_type); MonoClass *klass = mono_class_from_mono_type (type); // PART OF THE FIX // EmbeddedAssemblies::typemap_managed_to_java(MonoType *type, MonoClass *klass, const uint8_t *mvid) MonoImage *image = mono_class_get_image (klass) Fixing this led to the next issue, a managed exception thrown after the runtime failed to map a managed type name to Java type name: W monodroid-assembly: typemap: unable to find mapping to a Java type from managed type 'Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[T], Xamarin.Forms.Platform.Android' I monodroid-timing: Typemap.managed_to_java: end, total time; elapsed: 0s:0::33177 D Mono : DllImport attempting to load: '/system/lib64/liblog.so'. D Mono : DllImport loaded library '/system/lib64/liblog.so'. D Mono : DllImport searching in: '/system/lib64/liblog.so' ('/system/lib64/liblog.so'). D Mono : Searching for '__android_log_print'. D Mono : Probing '__android_log_print'. D Mono : Found as '__android_log_print'. I MonoDroid: UNHANDLED EXCEPTION: I MonoDroid: System.NotSupportedException: Cannot create instance of type 'Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[[Xamarin.Forms.Page, Xamarin.Forms.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null]]': no Java peer type found. I MonoDroid: at Java.Interop.JniPeerMembers+JniInstanceMethods..ctor (System.Type declaringType) [0x0004b] in <514e1249792e47a180b3f1293306b972>:0 I MonoDroid: at Java.Interop.JniPeerMembers+JniInstanceMethods.GetConstructorsForType (System.Type declaringType) [0x00031] in <514e1249792e47a180b3f1293306b972>:0 I MonoDroid: at Java.Interop.JniPeerMembers+JniInstanceMethods.StartCreateInstance (System.String constructorSignature, System.Type declaringType, Java.Interop.JniArgumentValue* parameters) [0x00038] in <514e1249792e47a180b3f1293306b972>:0 I MonoDroid: at Android.Support.V4.App.FragmentPagerAdapter..ctor (Android.Support.V4.App.FragmentManager fm) [0x0005b] in <fefee6c2c695459088a9df092723e052>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[T]..ctor (Xamarin.Forms.MultiPage`1[T] page, Android.Support.V4.App.FragmentManager fragmentManager) [0x00000] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.TabbedPageRenderer.CreateFormsViewPager (Android.Content.Context context, Xamarin.Forms.TabbedPage tabbedPage) [0x00033] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.TabbedPageRenderer.OnElementChanged (Xamarin.Forms.Platform.Android.ElementChangedEventArgs`1[TElement] e) [0x001cd] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].SetElement (TElement element) [0x000c0] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Xamarin.Forms.Platform.Android.IVisualElementRenderer.SetElement (Xamarin.Forms.VisualElement element) [0x00033] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.Platform.CreateRenderer (Xamarin.Forms.VisualElement element, Android.Content.Context context) [0x0001f] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.Platform.AddChild (Xamarin.Forms.Page page, System.Boolean layout) [0x0000d] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.Platform.SetPageInternal (Xamarin.Forms.Page newRoot) [0x00061] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.Platform.SetPage (Xamarin.Forms.Page newRoot) [0x000e6] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.FormsAppCompatActivity.InternalSetPage (Xamarin.Forms.Page page) [0x0003f] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.FormsAppCompatActivity.SetMainPage () [0x0000c] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.FormsAppCompatActivity.LoadApplication (Xamarin.Forms.Application application) [0x00140] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at SwipeViewDemo.Droid.MainActivity.OnCreate (Android.OS.Bundle savedInstanceState) [0x00035] in <15e30af50bb64ff6b6d20ac6fd546763>:0 I MonoDroid: at Android.App.Activity.n_OnCreate_Landroid_os_Bundle_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_savedInstanceState) [0x0000f] in <515e813169e54876823978ab785f569a>:0 I MonoDroid: at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.7(intptr,intptr,intptr) Note that the type name as seen by the native code via `mono_get_type_name_full()` is: Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[T], Xamarin.Forms.Platform.Android while `Mono.Android.dll` expects to be looking for: Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1, Xamarin.Forms.Platform.Android This discrepancy was caused by calling `mono_get_type_name_full()` with its format parameter set to `MONO_TYPE_NAME_FORMAT_REFLECTION`, while we needed the format value of `MONO_TYPE_NAME_FORMAT_FULL_NAME`.

Fixes: dotnet#4596 Context: a017561 Context: https://gist.github.com/pjcollins/87762e81f1f3c7e8b821356e4612eecf A missing parameter in a call to `log_debug` added in a017561 may lead to a segfault when `assembly` log category and `debug` log level are enabled: F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3 in tid 922 (DrawableTinting), pid 922 (DrawableTinting) I crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone I /system/bin/tombstoned: received crash request for pid 922 I crash_dump64: performing dump of process 922 (target tid = 922) F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** F DEBUG : Build fingerprint: 'Android/sdk_phone_x86_64/generic_x86_64:9/PSR1.180720.012/4923214:userdebug/test-keys' F DEBUG : Revision: '0' F DEBUG : ABI: 'x86_64' F DEBUG : pid: 922, tid: 922, name: DrawableTinting >>> com.xamarin.DrawableTinting <<< F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3 F DEBUG : Cause: null pointer dereference F DEBUG : rax 0000000000000000 rbx 00007ffed3c283c0 rcx 0000000000000003 rdx 0000000000000002 F DEBUG : r8 00007ffed3c283c0 r9 00000000ffffffff r10 00007ffed3c283d0 r11 00007ffed3c28824 F DEBUG : r12 00007c88774a2f17 r13 00000000ffffffff r14 0000000000000000 r15 00007ffed3c283d0 F DEBUG : rdi 0000000000000003 rsi 00007ffed3c283bb F DEBUG : rbp 00007ffed3c28f18 rsp 00007ffed3c28288 rip 00007c890f860761 F DEBUG : F DEBUG : backtrace: F DEBUG : #00 pc 0000000000020761 /system/lib64/libc.so (strlen+17) F DEBUG : #1 pc 000000000006e761 /system/lib64/libc.so (__vfprintf+5953) F DEBUG : #2 pc 000000000008df5d /system/lib64/libc.so (vsnprintf+189) F DEBUG : #3 pc 0000000000007b60 /system/lib64/liblog.so (__android_log_vprint+64) F DEBUG : dotnet#4 pc 000000000001350c /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (log_debug_nocheck(_LogCategories, char const*, ...)+204) F DEBUG : dotnet#5 pc 000000000000de6a /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(char const*)+538) F DEBUG : dotnet#6 pc 000000000000df13 /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(_MonoString*)+99) F DEBUG : dotnet#7 pc 00000000000d57f8 <anonymous:0000000042d04000> Add the missing parameter to prevent the `SIGSEGV` from happening.

…otnet#4673) Fixes: dotnet#4596 Context: a017561 Context: https://gist.github.com/pjcollins/87762e81f1f3c7e8b821356e4612eecf A missing parameter in a call to `log_debug` added iFixes: dotnet#4596 Context: a017561 Context: https://gist.github.com/pjcollins/87762e81f1f3c7e8b821356e4612eecf A missing parameter in a call to `log_debug()` added in a017561 may lead to a segfault when `assembly` log category and `debug` log level are enabled: F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3 in tid 922 (DrawableTinting), pid 922 (DrawableTinting) I crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone I /system/bin/tombstoned: received crash request for pid 922 I crash_dump64: performing dump of process 922 (target tid = 922) F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** F DEBUG : Build fingerprint: 'Android/sdk_phone_x86_64/generic_x86_64:9/PSR1.180720.012/4923214:userdebug/test-keys' F DEBUG : Revision: '0' F DEBUG : ABI: 'x86_64' F DEBUG : pid: 922, tid: 922, name: DrawableTinting >>> com.xamarin.DrawableTinting <<< F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3 F DEBUG : Cause: null pointer dereference F DEBUG : rax 0000000000000000 rbx 00007ffed3c283c0 rcx 0000000000000003 rdx 0000000000000002 F DEBUG : r8 00007ffed3c283c0 r9 00000000ffffffff r10 00007ffed3c283d0 r11 00007ffed3c28824 F DEBUG : r12 00007c88774a2f17 r13 00000000ffffffff r14 0000000000000000 r15 00007ffed3c283d0 F DEBUG : rdi 0000000000000003 rsi 00007ffed3c283bb F DEBUG : rbp 00007ffed3c28f18 rsp 00007ffed3c28288 rip 00007c890f860761 F DEBUG : F DEBUG : backtrace: F DEBUG : #00 pc 0000000000020761 /system/lib64/libc.so (strlen+17) F DEBUG : #1 pc 000000000006e761 /system/lib64/libc.so (__vfprintf+5953) F DEBUG : #2 pc 000000000008df5d /system/lib64/libc.so (vsnprintf+189) F DEBUG : #3 pc 0000000000007b60 /system/lib64/liblog.so (__android_log_vprint+64) F DEBUG : dotnet#4 pc 000000000001350c /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (log_debug_nocheck(_LogCategories, char const*, ...)+204) F DEBUG : dotnet#5 pc 000000000000de6a /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(char const*)+538) F DEBUG : dotnet#6 pc 000000000000df13 /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(_MonoString*)+99) F DEBUG : dotnet#7 pc 00000000000d57f8 <anonymous:0000000042d04000> Add the missing parameter to prevent the `SIGSEGV` from happening.n a017561 may lead to a segfault when `assembly` log category and `debug` log level are enabled: F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3 in tid 922 (DrawableTinting), pid 922 (DrawableTinting) I crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone I /system/bin/tombstoned: received crash request for pid 922 I crash_dump64: performing dump of process 922 (target tid = 922) F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** F DEBUG : Build fingerprint: 'Android/sdk_phone_x86_64/generic_x86_64:9/PSR1.180720.012/4923214:userdebug/test-keys' F DEBUG : Revision: '0' F DEBUG : ABI: 'x86_64' F DEBUG : pid: 922, tid: 922, name: DrawableTinting >>> com.xamarin.DrawableTinting <<< F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3 F DEBUG : Cause: null pointer dereference F DEBUG : rax 0000000000000000 rbx 00007ffed3c283c0 rcx 0000000000000003 rdx 0000000000000002 F DEBUG : r8 00007ffed3c283c0 r9 00000000ffffffff r10 00007ffed3c283d0 r11 00007ffed3c28824 F DEBUG : r12 00007c88774a2f17 r13 00000000ffffffff r14 0000000000000000 r15 00007ffed3c283d0 F DEBUG : rdi 0000000000000003 rsi 00007ffed3c283bb F DEBUG : rbp 00007ffed3c28f18 rsp 00007ffed3c28288 rip 00007c890f860761 F DEBUG : F DEBUG : backtrace: F DEBUG : #00 pc 0000000000020761 /system/lib64/libc.so (strlen+17) F DEBUG : #1 pc 000000000006e761 /system/lib64/libc.so (__vfprintf+5953) F DEBUG : #2 pc 000000000008df5d /system/lib64/libc.so (vsnprintf+189) F DEBUG : #3 pc 0000000000007b60 /system/lib64/liblog.so (__android_log_vprint+64) F DEBUG : dotnet#4 pc 000000000001350c /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (log_debug_nocheck(_LogCategories, char const*, ...)+204) F DEBUG : dotnet#5 pc 000000000000de6a /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(char const*)+538) F DEBUG : dotnet#6 pc 000000000000df13 /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(_MonoString*)+99) F DEBUG : dotnet#7 pc 00000000000d57f8 <anonymous:0000000042d04000> Add the missing parameter to prevent the `SIGSEGV` from happening.

Fixes: dotnet#4713 Context: mono/mono@10795da1c065c Context: mono/mono@8c085a99b32e9 Whenever Xamarin.Android runtime needs to instantiate a managed type, it first looks it up by calling the following function: MonoType *type = mono_reflection_type_from_name ("MyType, Assembly", nullptr); The `nullptr` pointer refers to an instance of the Mono `MonoImage` structure and if `null`, it should cause Mono to find the correct image containing the type and load it, if not already loaded. The pointer is propagated down the call chain inside Mono and due to one of the functions called not properly validating its arguments, the `null` pointer was dereferenced, leading to a crash similar to: libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x4c0 in tid 11029 (ompanyname.app3), pid 11029 (ompanyname.app3) crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone /system/bin/tombstoned: received crash request for pid 11029 crash_dump64: performing dump of process 11029 (target tid = 11029) DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** DEBUG : Build fingerprint: 'google/sdk_gphone_x86_64/generic_x86_64:10/QSR1.190920.001/5891938:user/release-keys' DEBUG : Revision: '0' DEBUG : ABI: 'x86_64' DEBUG : Timestamp: 2020-05-25 14:45:29+0200 DEBUG : pid: 11029, tid: 11029, name: ompanyname.app3 >>> com.companyname.app3 <<< DEBUG : uid: 10134 DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x4c0 DEBUG : Cause: null pointer dereference DEBUG : rax 000000000000002f rbx 0000000000000001 rcx 0000000000000000 rdx 0000000000000030 DEBUG : r8 0000000000000003 r9 000000000013e2e2 r10 0173eed800000000 r11 0000000000000206 DEBUG : r12 0000000000000000 r13 00007478530343c0 r14 00007478075eda33 r15 000074780763efb0 DEBUG : rdi 0000000000000000 rsi 00007478e2cb14d0 DEBUG : rbp 00007ffef3a35680 rsp 00007ffef3a355d0 rip 0000747807a4066a DEBUG : DEBUG : backtrace: DEBUG : #00 pc 00000000003ba66a /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonosgen-2.0.so (_mono_reflection_get_type_from_info+474) DEBUG : #1 pc 00000000003ba3d1 /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonosgen-2.0.so (mono_reflection_type_from_name_checked+321) DEBUG : #2 pc 00000000003ba26d /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonosgen-2.0.so (mono_reflection_type_from_name+125) DEBUG : #3 pc 000000000000ddb5 /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(char const*)+389) (BuildId: 9952f1cfe0d910ae631abc73479f88eef34fd71d) DEBUG : dotnet#4 pc 000000000000def3 /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(_MonoString*)+99) (BuildId: 9952f1cfe0d910ae631abc73479f88eef34fd71d) DEBUG : dotnet#5 pc 0000000000069532 <anonymous:5ad25000> Mono commit mono/mono@10795da1c06 fixes this issue. Other changes: * mono/mono@89d772a3abb Always include Unicode charinfo, so tar made in csc mode works in mcs mode (#19813) * mono/mono@e9d3af508e4 Bump bockbuild to get mono/bockbuild#159 * mono/mono@d6f0c25d34d [2020-02] Bump msbuild to track mono-2019-12 (#19661)

Fixes: dotnet#4713 Context: mono/mono@10795da1c065c Context: mono/mono@8c085a99b32e9 Changes: mono/mono@075c3f0...8c085a9 * mono/mono@8c085a99b32: [reflection] Check whether a pointer is valid before dereferencing (#19842) * mono/mono@89d772a3abb: Always include Unicode charinfo, so tar made in csc mode works in mcs mode (#19813) * mono/mono@e9d3af508e4: Bump bockbuild to get mono/bockbuild#159 * mono/mono@d6f0c25d34d: [2020-02] Bump msbuild to track mono-2019-12 (#19661) Whenever Xamarin.Android runtime needs to instantiate a managed type, it first looks it up by calling: MonoType *type = mono_reflection_type_from_name ("MyType, Assembly", nullptr); The `nullptr` pointer refers to an instance of the Mono `MonoImage` structure and if `nullptr`, it should cause Mono to find the correct image containing the type and load it, if not already loaded. The pointer is propagated down the call chain inside Mono and due to one of the functions called not properly validating its arguments, the `nullptr` pointer was dereferenced, leading to a crash similar to: libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x4c0 in tid 11029 (ompanyname.app3), pid 11029 (ompanyname.app3) crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone /system/bin/tombstoned: received crash request for pid 11029 crash_dump64: performing dump of process 11029 (target tid = 11029) DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** DEBUG : Build fingerprint: 'google/sdk_gphone_x86_64/generic_x86_64:10/QSR1.190920.001/5891938:user/release-keys' DEBUG : Revision: '0' DEBUG : ABI: 'x86_64' DEBUG : Timestamp: 2020-05-25 14:45:29+0200 DEBUG : pid: 11029, tid: 11029, name: ompanyname.app3 >>> com.companyname.app3 <<< DEBUG : uid: 10134 DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x4c0 DEBUG : Cause: null pointer dereference DEBUG : rax 000000000000002f rbx 0000000000000001 rcx 0000000000000000 rdx 0000000000000030 DEBUG : r8 0000000000000003 r9 000000000013e2e2 r10 0173eed800000000 r11 0000000000000206 DEBUG : r12 0000000000000000 r13 00007478530343c0 r14 00007478075eda33 r15 000074780763efb0 DEBUG : rdi 0000000000000000 rsi 00007478e2cb14d0 DEBUG : rbp 00007ffef3a35680 rsp 00007ffef3a355d0 rip 0000747807a4066a DEBUG : DEBUG : backtrace: DEBUG : #00 pc 00000000003ba66a /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonosgen-2.0.so (_mono_reflection_get_type_from_info+474) DEBUG : #1 pc 00000000003ba3d1 /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonosgen-2.0.so (mono_reflection_type_from_name_checked+321) DEBUG : #2 pc 00000000003ba26d /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonosgen-2.0.so (mono_reflection_type_from_name+125) DEBUG : #3 pc 000000000000ddb5 /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(char const*)+389) (BuildId: 9952f1cfe0d910ae631abc73479f88eef34fd71d) DEBUG : dotnet#4 pc 000000000000def3 /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(_MonoString*)+99) (BuildId: 9952f1cfe0d910ae631abc73479f88eef34fd71d) DEBUG : dotnet#5 pc 0000000000069532 <anonymous:5ad25000> Mono commit mono/mono@10795da1c06 fixes this issue.

Context: https://github.com/jfversluis/SwipeViewDemo Context: https://github.com/xamarin/Xamarin.Forms/blob/fa33ca3b3ac5c7c875023db785b56c67015e13b1/Xamarin.Forms.Platform.Android/AppCompat/TabbedPageRenderer.cs#L512 Commit 7117414 introduced native code which queries the Mono runtime to obtain an instance of a `MonoClass` for a given `MonoReflectionType` as well as the `MonoImage` associated with the `MonoClass`: // EmbeddedAssemblies::typemap_managed_to_java(MonoReflectionType *reflection_type, const uint8_t *mvid) MonoReflectionType *reflection_type = … MonoType *type = mono_reflection_type_get_type (reflection_type); MonoClass *klass = mono_type_get_class (type); // PROBLEMATIC // EmbeddedAssemblies::typemap_managed_to_java(MonoType *type, MonoClass *klass, const uint8_t *mvid) MonoImage *image = mono_class_get_image (klass); However, it appears that when dealing with closed generic types -- such as with `new GenericHolder<int>()` -- the above call chain results in a SIGSEGV instead of a valid `MonoImage*`: F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3000021 in tid 19030 (s.swipeviewdemo), pid 19030 (s.swipeviewdemo) I crash_dump32: obtaining output fd from tombstoned, type: kDebuggerdTombstone I /system/bin/tombstoned: received crash request for pid 19030 I crash_dump32: performing dump of process 19030 (target tid = 19030) F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** F DEBUG : Build fingerprint: 'google/sdk_gphone_x86/generic_x86:10/QSR1.191030.002/5978551:userdebug/dev-keys' F DEBUG : Revision: '0' F DEBUG : ABI: 'x86' F DEBUG : Timestamp: 2020-04-08 15:52:55+0200 F DEBUG : pid: 19030, tid: 19030, name: s.swipeviewdemo >>> nl.versluis.swipeviewdemo <<< F DEBUG : uid: 10135 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3000021 F DEBUG : eax 03000005 ebx cb9f4d24 ecx 7191c13b edx 00000004 F DEBUG : edi 03000005 esi ffb22080 F DEBUG : ebp ffb22108 esp ffb2206c eip cbcfc1e4 F DEBUG : F DEBUG : backtrace: F DEBUG : #00 pc 001b41e4 /data/app/Mono.Android.DebugRuntime-umHhDz421s4-tshrHwha0w==/lib/x86/libmonosgen-32bit-2.0.so (mono_image_get_name+4) F DEBUG : #1 pc 0000cac7 /data/app/nl.versluis.swipeviewdemo-jCFH_bcCNuFx1tLUhaJ4nw==/lib/x86/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(_MonoType*, _MonoClass*, unsigned char const*)+263) (BuildId: a2585ad379f788049e463af58c8686e9cdc1e778) F DEBUG : #2 pc 0000c8cc /data/app/nl.versluis.swipeviewdemo-jCFH_bcCNuFx1tLUhaJ4nw==/lib/x86/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(_MonoReflectionType*, unsigned char const*)+124) (BuildId: a2585ad379f788049e463af58c8686e9cdc1e778) F DEBUG : #3 pc 0001621a /data/app/nl.versluis.swipeviewdemo-jCFH_bcCNuFx1tLUhaJ4nw==/lib/x86/libmonodroid.so (xamarin::android::internal::MonodroidRuntime::typemap_managed_to_java(_MonoReflectionType*, unsigned char const*)+42) (BuildId: a2585ad379f788049e463af58c8686e9cdc1e778) F DEBUG : dotnet#4 pc 000325af <anonymous:c7858000> Investigating the issue I discovered that one of two things happened: 1. the returned `MonoImage` instance was invalid, *or* 2. the instance was valid but image name stored in `MonoImage` was `null` (1) would only happen in 32-bit builds, resulting in a SIGSEGV within `mono_image_get_name()`, because the `image` pointer value of 0x3000005 was invalid: I monodroid: const char *xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(MonoType *, MonoClass *, const uint8_t *) I monodroid: type == 0xc6e60d3c, klass == 0xc6e60cb8, mvid == 0xc8c02d90 I monodroid: type name == Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[Xamarin.Forms.Page] I monodroid: calling mono_class_get_image (0xc6e60cb8) I monodroid: image == 0x3000005 (2) only happened in 64-bit builds, resulting in a SIGSEGV as `strlen()` was passed a `null` pointer: I monodroid: const char *xamarin::android::internal::EmbeddedAssemblies::typemap_managed_to_java(MonoType *, MonoClass *, const uint8_t *) I monodroid: type == 0x7ce3fecc78, klass == 0x7ce3fecb98, mvid == 0x7ce9404520 I monodroid: type name == Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[Xamarin.Forms.Page] I monodroid: calling mono_class_get_image (0x7ce3fecb98) I monodroid: image == 0x7ce3fecbc8 I monodroid: image_name == <null> I found out that the root cause was in the `mono_type_get_class()` call which is supposed to be used with great caution as it eventually calls the `mono_type_get_class_internal()` function which is supposed to be called only for object types `MONO_TYPE_CLASS` and `MONO_TYPE_VALUETYPE` but not `MONO_TYPE_GENERICINST`, and `MONO_TYPE_GENERICINST` is used for closed generic types. The fix is to call the `mono_class_from_mono_type()` function instead which, albeit slower, is safer and works correctly in all cases: // EmbeddedAssemblies::typemap_managed_to_java(MonoReflectionType *reflection_type, const uint8_t *mvid) MonoReflectionType *reflection_type = … MonoType *type = mono_reflection_type_get_type (reflection_type); MonoClass *klass = mono_class_from_mono_type (type); // PART OF THE FIX // EmbeddedAssemblies::typemap_managed_to_java(MonoType *type, MonoClass *klass, const uint8_t *mvid) MonoImage *image = mono_class_get_image (klass) Fixing this led to the next issue, a managed exception thrown after the runtime failed to map a managed type name to Java type name: W monodroid-assembly: typemap: unable to find mapping to a Java type from managed type 'Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[T], Xamarin.Forms.Platform.Android' I monodroid-timing: Typemap.managed_to_java: end, total time; elapsed: 0s:0::33177 D Mono : DllImport attempting to load: '/system/lib64/liblog.so'. D Mono : DllImport loaded library '/system/lib64/liblog.so'. D Mono : DllImport searching in: '/system/lib64/liblog.so' ('/system/lib64/liblog.so'). D Mono : Searching for '__android_log_print'. D Mono : Probing '__android_log_print'. D Mono : Found as '__android_log_print'. I MonoDroid: UNHANDLED EXCEPTION: I MonoDroid: System.NotSupportedException: Cannot create instance of type 'Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[[Xamarin.Forms.Page, Xamarin.Forms.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null]]': no Java peer type found. I MonoDroid: at Java.Interop.JniPeerMembers+JniInstanceMethods..ctor (System.Type declaringType) [0x0004b] in <514e1249792e47a180b3f1293306b972>:0 I MonoDroid: at Java.Interop.JniPeerMembers+JniInstanceMethods.GetConstructorsForType (System.Type declaringType) [0x00031] in <514e1249792e47a180b3f1293306b972>:0 I MonoDroid: at Java.Interop.JniPeerMembers+JniInstanceMethods.StartCreateInstance (System.String constructorSignature, System.Type declaringType, Java.Interop.JniArgumentValue* parameters) [0x00038] in <514e1249792e47a180b3f1293306b972>:0 I MonoDroid: at Android.Support.V4.App.FragmentPagerAdapter..ctor (Android.Support.V4.App.FragmentManager fm) [0x0005b] in <fefee6c2c695459088a9df092723e052>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[T]..ctor (Xamarin.Forms.MultiPage`1[T] page, Android.Support.V4.App.FragmentManager fragmentManager) [0x00000] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.TabbedPageRenderer.CreateFormsViewPager (Android.Content.Context context, Xamarin.Forms.TabbedPage tabbedPage) [0x00033] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.TabbedPageRenderer.OnElementChanged (Xamarin.Forms.Platform.Android.ElementChangedEventArgs`1[TElement] e) [0x001cd] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].SetElement (TElement element) [0x000c0] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].Xamarin.Forms.Platform.Android.IVisualElementRenderer.SetElement (Xamarin.Forms.VisualElement element) [0x00033] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.Platform.CreateRenderer (Xamarin.Forms.VisualElement element, Android.Content.Context context) [0x0001f] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.Platform.AddChild (Xamarin.Forms.Page page, System.Boolean layout) [0x0000d] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.Platform.SetPageInternal (Xamarin.Forms.Page newRoot) [0x00061] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.AppCompat.Platform.SetPage (Xamarin.Forms.Page newRoot) [0x000e6] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.FormsAppCompatActivity.InternalSetPage (Xamarin.Forms.Page page) [0x0003f] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.FormsAppCompatActivity.SetMainPage () [0x0000c] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at Xamarin.Forms.Platform.Android.FormsAppCompatActivity.LoadApplication (Xamarin.Forms.Application application) [0x00140] in <9d12bb15abb54c508c4bee636d1b3a42>:0 I MonoDroid: at SwipeViewDemo.Droid.MainActivity.OnCreate (Android.OS.Bundle savedInstanceState) [0x00035] in <15e30af50bb64ff6b6d20ac6fd546763>:0 I MonoDroid: at Android.App.Activity.n_OnCreate_Landroid_os_Bundle_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_savedInstanceState) [0x0000f] in <515e813169e54876823978ab785f569a>:0 I MonoDroid: at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.7(intptr,intptr,intptr) Note that the type name as seen by the native code via `mono_get_type_name_full()` is: Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1[T], Xamarin.Forms.Platform.Android while `Mono.Android.dll` expects to be looking for: Xamarin.Forms.Platform.Android.AppCompat.FormsFragmentPagerAdapter`1, Xamarin.Forms.Platform.Android This discrepancy was caused by calling `mono_get_type_name_full()` with its format parameter set to `MONO_TYPE_NAME_FORMAT_REFLECTION`, while we needed the format value of `MONO_TYPE_NAME_FORMAT_FULL_NAME`.

…otnet#4673) Fixes: dotnet#4596 Context: a017561 Context: https://gist.github.com/pjcollins/87762e81f1f3c7e8b821356e4612eecf A missing parameter in a call to `log_debug` added iFixes: dotnet#4596 Context: a017561 Context: https://gist.github.com/pjcollins/87762e81f1f3c7e8b821356e4612eecf A missing parameter in a call to `log_debug()` added in a017561 may lead to a segfault when `assembly` log category and `debug` log level are enabled: F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3 in tid 922 (DrawableTinting), pid 922 (DrawableTinting) I crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone I /system/bin/tombstoned: received crash request for pid 922 I crash_dump64: performing dump of process 922 (target tid = 922) F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** F DEBUG : Build fingerprint: 'Android/sdk_phone_x86_64/generic_x86_64:9/PSR1.180720.012/4923214:userdebug/test-keys' F DEBUG : Revision: '0' F DEBUG : ABI: 'x86_64' F DEBUG : pid: 922, tid: 922, name: DrawableTinting >>> com.xamarin.DrawableTinting <<< F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3 F DEBUG : Cause: null pointer dereference F DEBUG : rax 0000000000000000 rbx 00007ffed3c283c0 rcx 0000000000000003 rdx 0000000000000002 F DEBUG : r8 00007ffed3c283c0 r9 00000000ffffffff r10 00007ffed3c283d0 r11 00007ffed3c28824 F DEBUG : r12 00007c88774a2f17 r13 00000000ffffffff r14 0000000000000000 r15 00007ffed3c283d0 F DEBUG : rdi 0000000000000003 rsi 00007ffed3c283bb F DEBUG : rbp 00007ffed3c28f18 rsp 00007ffed3c28288 rip 00007c890f860761 F DEBUG : F DEBUG : backtrace: F DEBUG : #00 pc 0000000000020761 /system/lib64/libc.so (strlen+17) F DEBUG : #1 pc 000000000006e761 /system/lib64/libc.so (__vfprintf+5953) F DEBUG : #2 pc 000000000008df5d /system/lib64/libc.so (vsnprintf+189) F DEBUG : #3 pc 0000000000007b60 /system/lib64/liblog.so (__android_log_vprint+64) F DEBUG : dotnet#4 pc 000000000001350c /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (log_debug_nocheck(_LogCategories, char const*, ...)+204) F DEBUG : dotnet#5 pc 000000000000de6a /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(char const*)+538) F DEBUG : dotnet#6 pc 000000000000df13 /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(_MonoString*)+99) F DEBUG : dotnet#7 pc 00000000000d57f8 <anonymous:0000000042d04000> Add the missing parameter to prevent the `SIGSEGV` from happening.n a017561 may lead to a segfault when `assembly` log category and `debug` log level are enabled: F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3 in tid 922 (DrawableTinting), pid 922 (DrawableTinting) I crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone I /system/bin/tombstoned: received crash request for pid 922 I crash_dump64: performing dump of process 922 (target tid = 922) F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** F DEBUG : Build fingerprint: 'Android/sdk_phone_x86_64/generic_x86_64:9/PSR1.180720.012/4923214:userdebug/test-keys' F DEBUG : Revision: '0' F DEBUG : ABI: 'x86_64' F DEBUG : pid: 922, tid: 922, name: DrawableTinting >>> com.xamarin.DrawableTinting <<< F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x3 F DEBUG : Cause: null pointer dereference F DEBUG : rax 0000000000000000 rbx 00007ffed3c283c0 rcx 0000000000000003 rdx 0000000000000002 F DEBUG : r8 00007ffed3c283c0 r9 00000000ffffffff r10 00007ffed3c283d0 r11 00007ffed3c28824 F DEBUG : r12 00007c88774a2f17 r13 00000000ffffffff r14 0000000000000000 r15 00007ffed3c283d0 F DEBUG : rdi 0000000000000003 rsi 00007ffed3c283bb F DEBUG : rbp 00007ffed3c28f18 rsp 00007ffed3c28288 rip 00007c890f860761 F DEBUG : F DEBUG : backtrace: F DEBUG : #00 pc 0000000000020761 /system/lib64/libc.so (strlen+17) F DEBUG : #1 pc 000000000006e761 /system/lib64/libc.so (__vfprintf+5953) F DEBUG : #2 pc 000000000008df5d /system/lib64/libc.so (vsnprintf+189) F DEBUG : #3 pc 0000000000007b60 /system/lib64/liblog.so (__android_log_vprint+64) F DEBUG : dotnet#4 pc 000000000001350c /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (log_debug_nocheck(_LogCategories, char const*, ...)+204) F DEBUG : dotnet#5 pc 000000000000de6a /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(char const*)+538) F DEBUG : dotnet#6 pc 000000000000df13 /data/app/com.xamarin.DrawableTinting-zvchh4ya_DW11GfpEPFICw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(_MonoString*)+99) F DEBUG : dotnet#7 pc 00000000000d57f8 <anonymous:0000000042d04000> Add the missing parameter to prevent the `SIGSEGV` from happening.

Fixes: dotnet#4713 Context: mono/mono@10795da1c065c Context: mono/mono@8c085a99b32e9 Changes: mono/mono@075c3f0...8c085a9 * mono/mono@8c085a99b32: [reflection] Check whether a pointer is valid before dereferencing (#19842) * mono/mono@89d772a3abb: Always include Unicode charinfo, so tar made in csc mode works in mcs mode (#19813) * mono/mono@e9d3af508e4: Bump bockbuild to get mono/bockbuild#159 * mono/mono@d6f0c25d34d: [2020-02] Bump msbuild to track mono-2019-12 (#19661) Whenever Xamarin.Android runtime needs to instantiate a managed type, it first looks it up by calling: MonoType *type = mono_reflection_type_from_name ("MyType, Assembly", nullptr); The `nullptr` pointer refers to an instance of the Mono `MonoImage` structure and if `nullptr`, it should cause Mono to find the correct image containing the type and load it, if not already loaded. The pointer is propagated down the call chain inside Mono and due to one of the functions called not properly validating its arguments, the `nullptr` pointer was dereferenced, leading to a crash similar to: libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x4c0 in tid 11029 (ompanyname.app3), pid 11029 (ompanyname.app3) crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone /system/bin/tombstoned: received crash request for pid 11029 crash_dump64: performing dump of process 11029 (target tid = 11029) DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** DEBUG : Build fingerprint: 'google/sdk_gphone_x86_64/generic_x86_64:10/QSR1.190920.001/5891938:user/release-keys' DEBUG : Revision: '0' DEBUG : ABI: 'x86_64' DEBUG : Timestamp: 2020-05-25 14:45:29+0200 DEBUG : pid: 11029, tid: 11029, name: ompanyname.app3 >>> com.companyname.app3 <<< DEBUG : uid: 10134 DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x4c0 DEBUG : Cause: null pointer dereference DEBUG : rax 000000000000002f rbx 0000000000000001 rcx 0000000000000000 rdx 0000000000000030 DEBUG : r8 0000000000000003 r9 000000000013e2e2 r10 0173eed800000000 r11 0000000000000206 DEBUG : r12 0000000000000000 r13 00007478530343c0 r14 00007478075eda33 r15 000074780763efb0 DEBUG : rdi 0000000000000000 rsi 00007478e2cb14d0 DEBUG : rbp 00007ffef3a35680 rsp 00007ffef3a355d0 rip 0000747807a4066a DEBUG : DEBUG : backtrace: DEBUG : #00 pc 00000000003ba66a /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonosgen-2.0.so (_mono_reflection_get_type_from_info+474) DEBUG : #1 pc 00000000003ba3d1 /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonosgen-2.0.so (mono_reflection_type_from_name_checked+321) DEBUG : #2 pc 00000000003ba26d /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonosgen-2.0.so (mono_reflection_type_from_name+125) DEBUG : #3 pc 000000000000ddb5 /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(char const*)+389) (BuildId: 9952f1cfe0d910ae631abc73479f88eef34fd71d) DEBUG : dotnet#4 pc 000000000000def3 /data/app/com.companyname.app3-aQUF6Ge6_v-WaLb5i8Q7vw==/lib/x86_64/libmonodroid.so (xamarin::android::internal::EmbeddedAssemblies::typemap_java_to_managed(_MonoString*)+99) (BuildId: 9952f1cfe0d910ae631abc73479f88eef34fd71d) DEBUG : dotnet#5 pc 0000000000069532 <anonymous:5ad25000> Mono commit mono/mono@10795da1c06 fixes this issue.

Changes: xamarin/NRefactory@0607a4a...495405a * xamarin/NRefactory@495405a6: Merge pull request #2 from jpobst/sdk-style * xamarin/NRefactory@e4d5997e: Update some project files to SDK-style. * xamarin/NRefactory@60ac8e99: Merge pull request #1 from xamarin/cecilPackageReference * xamarin/NRefactory@c2c07caa: Switch Cecil reference to PackageReference. We are working on using `dotnet build` to build `Xamarin.Android.sln` and `Xamarin.Android-Tests.sln`. `dotnet build` requires that all projects be SDK-style short-form projects. The `tests/MSBuildDeviceIntegration` integration tests use NRefactory as part of the debugger tests, to ensure that the debugger can attach to an app on-device. In order for `tests/MSBuildDeviceIntegration` to be buildable with `dotnet build`, NRefactory must have SDK-style `.csproj` files. Unfortunately, the [icsharpcode/NRefactory][0] repo only contains "long-form" projects, has been archived, and is now read-only. Switch to the [xamarin/NRefactory][1] repo, which is *not* archived and is maintained by the VSMac team, and bump to a commit which includes xamarin/NRefactory@e4d5997e, which migrates many of the `.csproj` files to SDK-style short-form projects. This allows us to continue our `dotnet build` explorations. [0]: https://github.com/icsharpcode/NRefactory [1]: https://github.com/xamarin/NRefactory

Context: dotnet#5619 It appears that Xamarin.Android application uploaded to Google Console internal Test Track can fail the pre-launch test because the `MonodroidRuntime::get_java_class_name_for_TypeManager` method, can sometimes get a `nullptr` Java class name from JNI: Build fingerprint: 'google/blueline/blueline:9/PQ3A.190801.002/5670241:user/release-keys' Revision: 'MP1.0' ABI: 'arm64' pid: 15773, tid: 15773, name: com.Myapp >>> com.Myapp<<< signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0 Cause: null pointer dereference x0 0000000000000000 x1 0000000000000000 x2 0000000000000000 x3 00000000000000e1 x4 0000000000000000 x5 0000000000000305 x6 0000000000000006 x7 0000000000000010 x8 0101010101010101 x9 4adfd1b7ed2e23e2 x10 0000000000430000 x11 000000000000000a x12 0000000000000002 x13 0000000000000001 x14 00000000000000a8 x15 000000000000000a x16 0000007f703f00f8 x17 0000007f7031f290 x18 0000000000000008 x19 0000000000000000 x20 0000007eecae0460 x21 0000000000000000 x22 0000000000000000 x23 0000000000000099 x24 0000000000000085 x25 0000007eecb30010 x26 0000000000000099 x27 0000000000000000 x28 0000007f724255e0 x29 0000007fe01ad010 sp 0000007fe01acff0 lr 0000007f7036f3b4 pc 0000007f7031f2a0 backtrace: #00 pc 000000000001e2a0 /system/lib64/libc.so (strlen+16) #1 pc 000000000006e3b0 /system/lib64/libc.so (strdup+20) #2 pc 000000000000d4e8 /data/app/com.Myapp-1lufsJe3FIZ0YHoEAB08KA==/split_config.arm64_v8a.apk (offset 0x165d000) (xamarin::android::internal::MonodroidRuntime::get_java_class_name_for_TypeManager(_jclass*)+92) #3 pc 000000000005f6d0 <anonymous:0000007ecc4ac000> This can happen if either one of the below points is true: 1. The Java [`Class.getName`](https://developer.android.com/reference/java/lang/Class?hl=en#getName()) method is absent 2. `Class.getName` returns `nullptr` (a nameless class?) 3. `env->GetStringUTFChars` returns `nullptr` (a memory allocation failure?) Out of these, 3. appears to be most probable and this commit adds a check for a `nullptr` pointer there, failing gracefully instead of segfaulting. This is NOT a fix for the original problem as we don't know by what it is caused but, nevertheless, the `nullptr` check should be there.

…otnet#5623) Context: dotnet#5619 It appears that Xamarin.Android application uploaded to Google Play Console internal Test Track can fail the pre-launch test because the `MonodroidRuntime::get_java_class_name_for_TypeManager()` method can sometimes get a `nullptr` Java class name from JNI: Build fingerprint: 'google/blueline/blueline:9/PQ3A.190801.002/5670241:user/release-keys' Revision: 'MP1.0' ABI: 'arm64' pid: 15773, tid: 15773, name: com.Myapp >>> com.Myapp<<< signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0 Cause: null pointer dereference x0 0000000000000000 x1 0000000000000000 x2 0000000000000000 x3 00000000000000e1 x4 0000000000000000 x5 0000000000000305 x6 0000000000000006 x7 0000000000000010 x8 0101010101010101 x9 4adfd1b7ed2e23e2 x10 0000000000430000 x11 000000000000000a x12 0000000000000002 x13 0000000000000001 x14 00000000000000a8 x15 000000000000000a x16 0000007f703f00f8 x17 0000007f7031f290 x18 0000000000000008 x19 0000000000000000 x20 0000007eecae0460 x21 0000000000000000 x22 0000000000000000 x23 0000000000000099 x24 0000000000000085 x25 0000007eecb30010 x26 0000000000000099 x27 0000000000000000 x28 0000007f724255e0 x29 0000007fe01ad010 sp 0000007fe01acff0 lr 0000007f7036f3b4 pc 0000007f7031f2a0 backtrace: #00 pc 000000000001e2a0 /system/lib64/libc.so (strlen+16) #1 pc 000000000006e3b0 /system/lib64/libc.so (strdup+20) #2 pc 000000000000d4e8 /data/app/com.Myapp-1lufsJe3FIZ0YHoEAB08KA==/split_config.arm64_v8a.apk (offset 0x165d000) (xamarin::android::internal::MonodroidRuntime::get_java_class_name_for_TypeManager(_jclass*)+92) #3 pc 000000000005f6d0 <anonymous:0000007ecc4ac000> This can happen if either one of the below points is true: 1. [`java.lang.Class.getName()`][0] returns `nullptr` (a nameless class? This seems unlikely.) 2. [`JNIEnv::GetStringUTFChars()`][1] returns `nullptr` (a memory allocation failure?) Of these, (2) appears to be most probable; regardless, add appropriate `nullptr` checks for each of them, failing gracefully instead of segfaulting. This is NOT a fix for the original problem as we don't know by what it is caused but, nevertheless, the `nullptr` check should be there. [0]: https://developer.android.com/reference/java/lang/Class?hl=en#getName() [1]: https://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/functions.html#GetStringUTFChars

) Changes: dotnet/installer@f442964...3ebe0ca Changes: dotnet/linker@7a5c445...620b243 Changes: dotnet/runtime@6430375...5a26d12 Context: https://github.com/dotnet/sdk/blob/1f544a59270cecb2947e50a01f7056c685b4e319/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.targets#L389-L392 Context: dotnet#5954 (comment) Context: dotnet#5669 (comment) Updates: * Microsoft.Dotnet.Sdk.Internal: [from 6.0.100-preview.5.21266.3 to 6.0.100-preview.6.21276.2][0] * Microsoft.NET.ILLink.Tasks: [from 6.0.100-preview.5.21264.1 to 6.0.100-preview.6.21275.1][1] * Microsoft.NETCore.App.Ref: [from 6.0.0-preview.5.21265.5 to 6.0.0-preview.6.21274.1][2] Update `.apkdesc` files, as `System.Net.Quic.dll` is now included in the Xamarin.Forms sample. Fix `azure-pipelines.yaml` so that if (when) the `Mono.Android.NET_Tests` unit tests fail, the corresponding `.apk` or `.aab` file is uploaded for our later investigation; see also commit af7f7f5, which contained a "typo" such that .NET 6 packages *weren't* uploaded on unit test failure, as they used the wrong target framework identifier in the path. Finally, and most annoying of all, the `$(InvariantGlobalization)` MSBuild property should *not* default to `false` in .NET 6 projects, as was introduced in commit 9ac280c, but instead should default to *the empty string*. The problem is due to [`Microsoft.NET.Sdk.targets`][3]: <RuntimeHostConfigurationOption Condition=" '$(InvariantGlobalization)' != '' " Include="System.Globalization.Invariant" Value="$(InvariantGlobalization)" Trim="true" /> The above fragment sets `%(RuntimeHostConfigurationOption.Trim)` to `True` for `System.Globalization.Invariant` whenever `$(InvariantGlobalization)` is *not* the empty string. The value `false` is *not* the empty string. This caused `System.Globalization.Invariant`-related trim features to be enabled, which had the unfortunate and unanticipated side effect of causing ICU to *not* be properly initialized when running the `Mono.Android.NET_Tests` unit test apps, which resulted in a SIGSEGV: libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0 in tid 31880 (droid.NET_Tests), pid 31880 (droid.NET_Tests) crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstone tombstoned: received crash request for pid 31880 crash_dump64: performing dump of process 31880 (target tid = 31880) DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** DEBUG : Build fingerprint: 'google/redfin/redfin:11/RQ1A.201205.011/6966805:user/release-keys' DEBUG : Revision: 'MP1.0' DEBUG : ABI: 'arm64' DEBUG : Timestamp: 2021-05-26 15:21:42-0400 DEBUG : pid: 31880, tid: 31880, name: droid.NET_Tests >>> Mono.Android.NET_Tests <<< DEBUG : uid: 10282 DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0 DEBUG : Cause: null pointer dereference DEBUG : x0 b400007c4de52530 x1 0000007fcc4cbeec x2 fffffffffffffff0 x3 b400007d2de37c80 DEBUG : x4 b400007d2de37cf0 x5 0000000000000004 x6 0000007c2225ddac x7 0000007fcc4cbfe0 DEBUG : x8 0000000000000000 x9 000000001333c921 x10 0000000000000000 x11 000000002de37cf0 DEBUG : x12 000000002a742e66 x13 0000000000000012 x14 0000000000000200 x15 0000000000000011 DEBUG : x16 0000007bd6adb810 x17 0000007ed2056240 x18 0000007ed3b94000 x19 0000007fcc4cc040 DEBUG : x20 b400007c4de52530 x21 b400007c4de52530 x22 0000000000000000 x23 b400007d7de490c0 DEBUG : x24 0000000000000001 x25 0000007bd58055c0 x26 0000007bd5cc0130 x27 0000007ed33ab000 DEBUG : x28 0000007bd6af1000 x29 0000007fcc4cbf00 DEBUG : lr 0000007bd69119c8 sp 0000007fcc4cbee0 pc 0000000000000000 pst 0000000080001000 … DEBUG : backtrace: DEBUG : #00 pc 0000000000000000 <unknown> DEBUG : #1 pc 000000000014e9c4 /data/app/~~oruJhhqj_EC_NWSaIGF_RQ==/Mono.Android.NET_Tests-G1iNxUwmGyu-tDRqYcK94g==/lib/arm64/libmonosgen-2.0.so (GlobalizationNative_GetSortHandle+76) (BuildId: 869ce5526fa884035199acac4ddc81bb6eeaf134) DEBUG : #2 pc 000000000000ddbc <anonymous:7c22250000> While we've (inadvertently) had `%(Trim)` enabled for over three months now, the *trigger* for this particular crash appears to be commit dotnet/runtime@bc27d49, which moved ICU initialization outside of the `GlobalizationMode` static constructor and into a new `GlobalizationMode.Settings` static constructor…which wasn't executed. Explicitly setting `$(InvariantGlobalization)` to the empty string *unless* it is the value `true` allows us to avoid setting `%(RuntimeHostConfigurationOption.Trim)`=True for `System.Globalization.Invariant`, which in turn avoids whatever set of linker-induced changes were preventing ICU from being properly initialized, which avoids the SIGSEGV. Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com> Co-authored-by: Jonathan Peppers <[email protected]> Co-authored-by: Peter Collins <[email protected]> [0]: dotnet/installer@f442964...3ebe0ca [1]: dotnet/linker@7a5c445...620b243 [2]: dotnet/runtime@6430375...5a26d12 [3]: https://github.com/dotnet/sdk/blob/1f544a59270cecb2947e50a01f7056c685b4e319/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.targets#L389-L392

Context: dotnet#6420 (comment) Clang's AddressSanitizer detected the following: 10-26 15:55:25.393 2488 2488 I Mono.Android_Tests: ==2488==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x8a600774 at pc 0xaeee9982 bp 0xbf98dc68 sp 0xbf98dc60 10-26 15:55:25.394 2488 2488 I Mono.Android_Tests: WRITE of size 4 at 0x8a600774 thread T0 10-26 15:55:25.398 2488 2488 I Mono.Android_Tests: #0 0xaeee9981 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x38981) 10-26 15:55:25.398 2488 2488 I Mono.Android_Tests: #1 0xaeef92d9 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x482d9) 10-26 15:55:25.398 2488 2488 I Mono.Android_Tests: #2 0xaef009ae (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x4f9ae) 10-26 15:55:25.398 2488 2488 I Mono.Android_Tests: #3 0xaef06d14 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x55d14) 10-26 15:55:25.399 2488 2488 I Mono.Android_Tests: 0x8a600774 is located 0 bytes to the right of 4-byte region [0x8a600770,0x8a600774) 10-26 15:55:25.399 2488 2488 I Mono.Android_Tests: allocated by thread T0 here: 10-26 15:55:25.399 2488 2488 I Mono.Android_Tests: #0 0xaedbe925 (/data/app/Mono.Android_Tests-1/lib/x86/libclang_rt.asan-i686-android.so+0xb6925) 10-26 15:55:25.399 2488 2488 I Mono.Android_Tests: #1 0xaeee9ae1 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x38ae1) 10-26 15:55:25.399 2488 2488 I Mono.Android_Tests: #2 0xaeee9751 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x38751) 10-26 15:55:25.399 2488 2488 I Mono.Android_Tests: #3 0xaeef92d9 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x482d9) 10-26 15:55:25.399 2488 2488 I Mono.Android_Tests: dotnet#4 0xaef009ae (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x4f9ae) 10-26 15:55:25.400 2488 2488 I Mono.Android_Tests: dotnet#5 0xaef06d14 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x55d14) 10-26 15:55:25.400 2488 2488 I Mono.Android_Tests: dotnet#6 0xb30cb970 (/data/dalvik-cache/x86/data@[email protected][email protected]@classes.dex+0x5c970) 10-26 15:55:25.400 2488 2488 I Mono.Android_Tests: SUMMARY: AddressSanitizer: heap-buffer-overflow (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x38981) Address of the offending region points to `BasicUtilities::monodroid_strsplit` and is likely the line modified in this commit. Append terminating `nullptr` to vector instead of overwriting the last element.

) Context: dotnet#6420 (comment) Clang's AddressSanitizer detected the following: Mono.Android_Tests: ==2488==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x8a600774 at pc 0xaeee9982 bp 0xbf98dc68 sp 0xbf98dc60 Mono.Android_Tests: WRITE of size 4 at 0x8a600774 thread T0 Mono.Android_Tests: #0 0xaeee9981 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x38981) Mono.Android_Tests: #1 0xaeef92d9 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x482d9) Mono.Android_Tests: #2 0xaef009ae (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x4f9ae) Mono.Android_Tests: #3 0xaef06d14 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x55d14) Mono.Android_Tests: 0x8a600774 is located 0 bytes to the right of 4-byte region [0x8a600770,0x8a600774) Mono.Android_Tests: allocated by thread T0 here: Mono.Android_Tests: #0 0xaedbe925 (/data/app/Mono.Android_Tests-1/lib/x86/libclang_rt.asan-i686-android.so+0xb6925) Mono.Android_Tests: #1 0xaeee9ae1 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x38ae1) Mono.Android_Tests: #2 0xaeee9751 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x38751) Mono.Android_Tests: #3 0xaeef92d9 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x482d9) Mono.Android_Tests: dotnet#4 0xaef009ae (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x4f9ae) Mono.Android_Tests: dotnet#5 0xaef06d14 (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x55d14) Mono.Android_Tests: dotnet#6 0xb30cb970 (/data/dalvik-cache/x86/data@[email protected][email protected]@classes.dex+0x5c970) Mono.Android_Tests: SUMMARY: AddressSanitizer: heap-buffer-overflow (/data/app/Mono.Android_Tests-1/lib/x86/libmonodroid.so+0x38981) Address of the offending region points to `BasicUtilities::monodroid_strsplit()` and is likely the line modified in this commit. Append terminating `nullptr` to `vector` instead of overwriting the last element.

Commit 6eb11f1 added support for API-32, while keeping the .NET 6 default `$(TargetFramework)` value as `net6.0-android31.0`: > However, we don't want to change the default API level for .NET 6 > projects; the default will remain `net6.0-android31.0` (API-31), This appears to have had some unforeseen complications: we would use the API-31 `Mono.Android.dll`, with the API-32 `libmonodroid.so`/etc. runtime libraries. This in turn appears to be responsible for some crashes we've seen on CI ever since commit c227042 when running the `Mono.Android.NET_Tests` unit tests under .NET 6 with the interpreter enabled, because `libxamarin-app.so` and `libmonodroid.so` have ABI dependencies: DOTNET : JNI_OnLoad: JNI_OnLoad in pal_jni.c libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x2 in tid 3666 (droid.NET_Tests), pid 3666 (droid.NET_Tests) crash_dump64: performing dump of process 3666 (target tid = 3666) DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** DEBUG : Build fingerprint: 'Android/sdk_phone_x86_64/generic_x86_64:10/QPP6.190730.005.B1/5775370:userdebug/test-keys' DEBUG : Revision: '0' DEBUG : ABI: 'x86_64' DEBUG : Timestamp: 2022-01-18 16:53:04+0000 DEBUG : pid: 3666, tid: 3666, name: droid.NET_Tests >>> Mono.Android.NET_Tests <<< DEBUG : uid: 10105 DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x2 DEBUG : Cause: null pointer dereference DEBUG : rax 0000000000002b36 rbx 000078c8afb3f860 rcx 000078c98b6561f0 rdx 0000000000000000 DEBUG : r8 0000000000000002 r9 0000000000000080 r10 000078c98b296080 r11 000078c987d35178 DEBUG : r12 00007fffe46ae99c r13 000078c8afb89ea0 r14 000078c8afb3f990 r15 000078c98b6746c0 DEBUG : rdi 000078c8afb3f860 rsi 0000000000000002 DEBUG : rbp 0000000000000001 rsp 00007fffe46ae448 rip 000078c8afb1b31c main : type=1400 audit(0.0:40): avc: granted { read } for name="u:object_r:net_dns_prop:s0" dev="tmpfs" ino=6642 scontext=u:r:untrusted_app_25:s0:c512,c768 tcontext=u:object_r:net_dns_prop:s0 tclass=file app=Mono.Android.NET_Tests DEBUG : DEBUG : backtrace: DEBUG : #00 pc 000000000002c31c /data/app/Mono.Android.NET_Tests-fbdZV696v1UeW3jUzJg9yg==/lib/x86_64/libmonodroid.so (xamarin::android::Util::monodroid_store_package_name(char const*)+12) (BuildId: 91fe7d9c6b30356fcfb8337b8541d0132df4f44a) DEBUG : #1 pc 0000000000025bbc /data/app/Mono.Android.NET_Tests-fbdZV696v1UeW3jUzJg9yg==/lib/x86_64/libmonodroid.so (xamarin::android::internal::MonodroidRuntime::Java_mono_android_Runtime_initInternal(_JNIEnv*, _jclass*, _jstring*, _jobjectArray*, _jstring*, _jobjectArray*, _jobject*, _jobjectArray*, int, unsigned char, unsigned char)+652) (BuildId: 91fe7d9c6b30356fcfb8337b8541d0132df4f44a) DEBUG : #2 pc 00000000000273fb /data/app/Mono.Android.NET_Tests-fbdZV696v1UeW3jUzJg9yg==/lib/x86_64/libmonodroid.so (Java_mono_android_Runtime_initInternal+75) (BuildId: 91fe7d9c6b30356fcfb8337b8541d0132df4f44a) DEBUG : #3 pc 0000000000174641 /apex/com.android.runtime/lib64/libart.so (art_quick_generic_jni_trampoline+209) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) … Thinking about it more, we should only need to use the API-31 "ref" or "targeting" pack. The "runtime" pack can just use the latest from the workload. To fix this: 1. Create new `$(_AndroidTargetingPackId)` and `$(_AndroidTargetingPackVersion)` properties to use independently of the runtime pack version. 2. Remove `Microsoft.Android.Runtime.31.[rid]` packs from the workload. 3. Remove the `android-32` workload, as it should no longer be needed. The API 31 "ref" pack is fairly small and can go in the `android` workload. Now our `android` workload is: * `Microsoft.Android.Sdk` * `Microsoft.Android.Ref.31` * `Microsoft.Android.Ref.32` * `Microsoft.Android.Runtime.32.android-arm` * `Microsoft.Android.Runtime.32.android-arm64` * `Microsoft.Android.Runtime.32.android-x86` * `Microsoft.Android.Runtime.32.android-x64` * `Microsoft.Android.Templates` After these changes, I get this assembly at build time: dotnet\packs\Microsoft.Android.Ref.31\31.0.101-preview.11.117\ref\net6.0\Mono.Android.dll And this assembly at runtime: dotnet\packs\Microsoft.Android.Runtime.32.android-arm64\31.0.200-preview.13.21\runtimes\android-arm64\lib\net6.0\Mono.Android.dll Additionally, CI is fully green; in particular, the **APKs .NET - macOS** step is green, which hasn't been true on xamarin-android/main since commit c227042.

…6672) Context: dotnet/maui#4262 Context: dotnet#6675 If you run the `maui-blazor` template in a Release build: dotnet build -t:Run -c Release it crashes at runtime: D monodroid-assembly: typemap: type with token 33555274 (0x200034a) in module {C7B4CC8F-7A03-4A3F-A34A-DC66EDC548B9} (Mono.Android) corresponds to Java type 'android/runtime/JavaProxyThrowable' … F DEBUG : backtrace: F DEBUG : #00 pc 000000000065d8fc /apex/com.android.art/lib64/libart.so (void art::StackVisitor::WalkStack<(art::StackVisitor::CountTransitions)0>(bool)+156) (BuildId: 7fbaf2a1a3317bd634b00eb90e32291e) F DEBUG : #1 pc 000000000069b25d /apex/com.android.art/lib64/libart.so (art::Thread::GetCurrentMethod(unsigned int*, bool, bool) const+157) (BuildId: 7fbaf2a1a3317bd634b00eb90e32291e) F DEBUG : #2 pc 0000000000430fed /apex/com.android.art/lib64/libart.so (art::JNI<false>::FindClass(_JNIEnv*, char const*)+765) (BuildId: 7fbaf2a1a3317bd634b00eb90e32291e) F DEBUG : #3 pc 0000000000047e5a /data/app/~~0Qm6D1S0sO3f1lwfakN0PA==/com.companyname.mauiapp2-08UokVCH5k_PlbZEH_hhkA==/split_config.x86_64.apk!libmono-android.release.so (offset 0x11e000) (java_interop_jnienv_find_class+26) (BuildId: 3d04f8b946590175e97b89aee2e3b19ceed4b524) F DEBUG : dotnet#4 pc 00000000000128ac <anonymous:41640000> The crash can be avoided by disabling the linker: dotnet build -t:Run -c Release -p:AndroidLinkMode=None # -or- dotnet build -t:Run -c Release -p:PublishTrimmed=false However, let us return to the crash: *why* is it crashing? This isn't a "good debugging experience"; we have no useful context. Lots of investigation later -- all hail printf debugging -- and we found that the cause of the crash was an unhandled exception: 1. `Mono.Android.dll` has it's Java Callable Wrappers generated from the *unlinked* assembly, into `mono.android.jar` and `mono.android.dex` files. The Java Callable Wrapper for `Android.Runtime.InputStreamAdapter` thus includes *all* `Read()` method overloads. 2. When the app is built in Release configuration, linking is enabled, and *some* of the `InputStreamAdapter.Read()` methods are removed by the linker, along with the `Java.IO.InputStream.Read()` methods that were overridden. 3. At runtime, we perform [Java Type Registration][0] for the `Android.Runtime.InputStreamAdapter` type, which eventually calls `AndroidTypeManager.RegisterNativeMembers()`, which eventually attempts to *effectively* do: Delegate.CreateDelegate ( typeof(Func<Delegate>), typeof(InputStreamAdapter), "GetReadHandler"); 4. Because of (2), `Java.IO.InputStream.GetReadHandler()` *does not exist*, and thus `Delegate.CreateDelegate()` throws an `ArgumentException`. So far, so reasonable, but… 5. `AndroidTypeManager.RegisterNativeMembers()` didn't catch any exceptions, nor did any other method between the original Java `Runtime.register()` invocation and `AndroidTypeManager.RegisterNativeMembers()`. The result is that a C# exception was "in flight", and Mono then proceeded to *tear down the stack frame* as it unwound the callstack looking for `catch` handlers. At this point, the process is toast: the runtime stack is FUBAR. This is also why the `backtrace:` is "rooted" in `JNIEnv::FindClass()`: `JNIEnv::FindClass()` invokes Java static constructors before returning, which is how the static constructor in the Java Callable Wrapper for `InputStreamAdapter` called `Runtime.register()` in the first place. All of this makes for a miserable debugging experience. Fixing the "original" linker issue will be done in dotnet#6675. This hasn't been an issue in "Classic" Xamarin.Android, presumably because the classic linker isn't as good as the net6 linker. What we want to do *here* is improve this debugging experience, by "wrapping" `AndroidTypeManager.RegisterNativeMembers()` in a `try`/`catch` block, which can then *marshal the thrown exception* back to Java. This *prevents* Mono from unwinding the callstack past a JNI boundary, and avoids the annoying-to-debug app crash. After this change, we get a much friendlier unhandled exception crash: I MonoDroid: Android.Runtime.JavaProxyThrowable: Exception_WasThrown, Android.Runtime.JavaProxyThrowable I MonoDroid: I MonoDroid: --- End of managed Android.Runtime.JavaProxyThrowable stack trace --- I MonoDroid: android.runtime.JavaProxyThrowable: System.ArgumentException: Arg_DlgtTargMeth I MonoDroid: at System.Delegate.CreateDelegate(Type , Type , String , Boolean , Boolean ) I MonoDroid: at System.Delegate.CreateDelegate(Type , Type , String ) I MonoDroid: at Android.Runtime.AndroidTypeManager.RegisterNativeMembers(JniType , Type , String ) I MonoDroid: --- End of stack trace from previous location --- I MonoDroid: at Java.Interop.JniEnvironment.StaticMethods.CallStaticObjectMethod(JniObjectReference , JniMethodInfo , JniArgumentValue* ) I MonoDroid: at Android.Runtime.JNIEnv.CallStaticObjectMethod(IntPtr , IntPtr , JValue* ) I MonoDroid: at Android.Runtime.JNIEnv.CallStaticObjectMethod(IntPtr , IntPtr , JValue[] ) I MonoDroid: at Android.Runtime.JNIEnv.FindClass(String ) I MonoDroid: at Android.Runtime.JNIEnv.AllocObject(String ) I MonoDroid: at Android.Runtime.JNIEnv.StartCreateInstance(String , String , JValue* ) I MonoDroid: at Android.Runtime.JNIEnv.StartCreateInstance(String , String , JValue[] ) I MonoDroid: at Android.Runtime.InputStreamAdapter..ctor(Stream ) I MonoDroid: at Android.Runtime.InputStreamAdapter.ToLocalJniHandle(Stream ) I MonoDroid: at Android.Webkit.WebResourceResponse..ctor(String , String , Int32 , String , IDictionary`2 , Stream ) I MonoDroid: at Microsoft.AspNetCore.Components.WebView.Maui.WebKitWebViewClient.ShouldInterceptRequest(WebView view, IWebResourceRequest request) I MonoDroid: at Android.Webkit.WebViewClient.n_ShouldInterceptRequest_Landroid_webkit_WebView_Landroid_webkit_WebResourceRequest_(IntPtr , IntPtr , IntPtr , IntPtr ) I MonoDroid: at crc64d693e2d9159537db.WebKitWebViewClient.n_shouldInterceptRequest(Native Method) I MonoDroid: at crc64d693e2d9159537db.WebKitWebViewClient.shouldInterceptRequest(WebKitWebViewClient.java:39) I MonoDroid: at Rr.a(chromium-TrichromeWebViewGoogle.apk-stable-410410686:16) I MonoDroid: at org.chromium.android_webview.AwContentsBackgroundThreadClient.shouldInterceptRequestFromNative(chromium-TrichromeWebViewGoogle.apk-stable-410410686:2) I MonoDroid: I MonoDroid: --- End of managed Android.Runtime.JavaProxyThrowable stack trace --- I MonoDroid: android.runtime.JavaProxyThrowable: System.ArgumentException: Arg_DlgtTargMeth I MonoDroid: at System.Delegate.CreateDelegate(Type , Type , String , Boolean , Boolean ) I MonoDroid: at System.Delegate.CreateDelegate(Type , Type , String ) I MonoDroid: at Android.Runtime.AndroidTypeManager.RegisterNativeMembers(JniType , Type , String ) I MonoDroid: --- End of stack trace from previous location --- I MonoDroid: at Java.Interop.JniEnvironment.StaticMethods.CallStaticObjectMethod(JniObjectReference , JniMethodInfo , JniArgumentValue* ) I MonoDroid: at Android.Runtime.JNIEnv.CallStaticObjectMethod(IntPtr , IntPtr , JValue* ) I MonoDroid: at Android.Runtime.JNIEnv.CallStaticObjectMethod(IntPtr , IntPtr , JValue[] ) I MonoDroid: at Android.Runtime.JNIEnv.FindClass(String ) I MonoDroid: at Android.Runtime.JNIEnv.AllocObject(String ) I MonoDroid: at Android.Runtime.JNIEnv.StartCreateInstance(String , String , JValue* ) I MonoDroid: at Android.Runtime.JNIEnv.StartCreateInstance(String , String , JValue[] ) I MonoDroid: at Android.Runtime.InputStreamAdapter..ctor(Stream ) I MonoDroid: at Android.Runtime.InputStreamAdapter.ToLocalJniHandle(Stream ) I MonoDroid: at Android.Webkit.WebResourceResponse..ctor(String , String , Int32 , String , IDictionary`2 , Stream ) I MonoDroid: at Microsoft.AspNetCore.Components.WebView.Maui.WebKitWebViewClient.ShouldInterceptRequest(WebView view, IWebResourceRequest request) I MonoDroid: at Android.Webkit.WebViewClient.n_ShouldInterceptRequest_Landroid_webkit_WebView_Landroid_webkit_WebResourceRequest_(IntPtr , IntPtr , IntPtr , IntPtr ) I MonoDroid: at crc64d693e2d9159537db.WebKitWebViewClient.n_shouldInterceptRequest(Native Method) I MonoDroid: at crc64d693e2d9159537db.WebKitWebViewClient.shouldInterceptRequest(WebKitWebViewClient.java:39) I MonoDroid: at Rr.a(chromium-TrichromeWebViewGoogle.apk-stable-410410686:16) I MonoDroid: at org.chromium.android_webview.AwContentsBackgroundThreadClient.shouldInterceptRequestFromNative(chromium-TrichromeWebViewGoogle.apk-stable-410410686:2) This is much easier to reason about, and will save us time in the future. [0]: https://github.com/xamarin/xamarin-android/wiki/Blueprint#java-type-registration

Context: dotnet/install-scripts#15 Context: https://dot.net/v1/dotnet-install.sh Context: https://dot.net/v1/dotnet-install.ps1 We've been installing dotnet versions using the [`dotnet-install`][0] scripts for Unix & Windows. However, they do not cache the downloaded archive, and therefore we end up re-downloading the same archive over and over again. Additionally, if one finds themselves without an internet connection, there's no way to easily install the required version of dotnet. The installation scripts don't provide a way to cache the payloads and they appear to be in maintenance mode (dotnet/install-scripts#15), so there doesn't appear to be a chance to add caching support to them. Fortunately, we can "ask" the scripts what they're downloading: % curl -o dotnet-install.sh 'https://dot.net/v1/dotnet-install.sh' % ./dotnet-install.sh --version 7.0.100-preview.5.22273.1 --verbose --dry-run \ | grep 'dotnet-install: URL' This returns a list of URLs, which may or may not exist: dotnet-install: URL #0 - primary: https://dotnetcli.azureedge.net/dotnet/Sdk/7.0.100-preview.5.22273.1/dotnet-sdk-7.0.100-preview.5.22273.1-osx-x64.tar.gz dotnet-install: URL #1 - legacy: https://dotnetcli.azureedge.net/dotnet/Sdk/7.0.100-preview.5.22273.1/dotnet-dev-osx-x64.7.0.100-preview.5.22273.1.tar.gz dotnet-install: URL #2 - primary: https://dotnetbuilds.azureedge.net/public/Sdk/7.0.100-preview.5.22273.1/dotnet-sdk-7.0.100-preview.5.22273.1-osx-x64.tar.gz dotnet-install: URL #3 - legacy: https://dotnetbuilds.azureedge.net/public/Sdk/7.0.100-preview.5.22273.1/dotnet-dev-osx-x64.7.0.100-preview.5.22273.1.tar.gz We now parse this output, extract the URLs, then download and cache the URL contents into `$(AndroidToolchainCacheDirectory)`. When we need to install .NET, we just extract the cached archive into the appropriate directory. If no `dotnet-install: URL…` messages are generated, then we run the `dotnet-install` script as we previously did. This process lets us take a first step towards fully "offline" builds, along with smaller downloads on CI servers. [0]: https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet-install-script

9-15 22:56:28.431 15070 15090 W monodroid: jclass java_interop_jnienv_find_class(JNIEnv *, jthrowable *, const char *) looking for 'android/content/Intent$ShortcutIconResource' --------- beginning of crash 09-15 22:56:28.432 15070 15090 F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0xbb60ca20 in tid 15090 (Instrumentation), pid 15070 (droid.NET_Tests) 09-15 22:56:28.757 15103 15103 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 09-15 22:56:28.757 15103 15103 F DEBUG : Build fingerprint: 'google/raven/raven:13/TP1A.220624.021/8877034:user/release-keys' 09-15 22:56:28.757 15103 15103 F DEBUG : Revision: 'MP1.0' 09-15 22:56:28.757 15103 15103 F DEBUG : ABI: 'arm64' 09-15 22:56:28.757 15103 15103 F DEBUG : Timestamp: 2022-09-15 22:56:28.545823727+0200 09-15 22:56:28.757 15103 15103 F DEBUG : Process uptime: 3s 09-15 22:56:28.757 15103 15103 F DEBUG : Cmdline: Mono.Android.NET_Tests 09-15 22:56:28.757 15103 15103 F DEBUG : pid: 15070, tid: 15090, name: Instrumentation >>> Mono.Android.NET_Tests <<< 09-15 22:56:28.757 15103 15103 F DEBUG : uid: 10638 09-15 22:56:28.757 15103 15103 F DEBUG : tagged_addr_ctrl: 0000000000000001 (PR_TAGGED_ADDR_ENABLE) 09-15 22:56:28.757 15103 15103 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x00000000bb60ca20 09-15 22:56:28.757 15103 15103 F DEBUG : x0 b400006e8ea08350 x1 0000000000000001 x2 0000000000000001 x3 0000000000000010 09-15 22:56:28.757 15103 15103 F DEBUG : x4 0000006dbaea7233 x5 0000006deea682be x6 0000000000000020 x7 0000000000000020 09-15 22:56:28.757 15103 15103 F DEBUG : x8 0000000000000008 x9 00000000bb60c9e0 x10 0000006deea682a7 x11 0000006deea682a7 09-15 22:56:28.757 15103 15103 F DEBUG : x12 3d2120746e696f70 x13 7274706c6c756e20 x14 0000006d3d90b998 x15 000000a74ab3008e 09-15 22:56:28.757 15103 15103 F DEBUG : x16 0000006dbb60f6b8 x17 0000007074e7b9ac x18 0000006d394cc000 x19 0000006d3d90b6d8 09-15 22:56:28.757 15103 15103 F DEBUG : x20 b400006e8ea08350 x21 0000000000000001 x22 0000006d3d90e000 x23 0000006d3d90b6d8 09-15 22:56:28.757 15103 15103 F DEBUG : x24 0000006d3d90b830 x25 0000006d3d90bb80 x26 0000006e7ea14cf0 x27 b400006e8ea08350 09-15 22:56:28.757 15103 15103 F DEBUG : x28 0000000000000000 x29 0000006d3d90b5d0 09-15 22:56:28.757 15103 15103 F DEBUG : lr 0000006dbb16f3dc sp 0000006d3d90b5b0 pc 0000006dbb171d44 pst 0000000080001000 09-15 22:56:28.757 15103 15103 F DEBUG : backtrace: 09-15 22:56:28.757 15103 15103 F DEBUG : #00 pc 0000000000371d44 /apex/com.android.art/lib64/libart.so (art::ArtMethod::PrettyMethod(bool)+76) (BuildId: 56e704c544e6c624201be2ab4933e853) 09-15 22:56:28.757 15103 15103 F DEBUG : #1 pc 000000000036f3d8 /apex/com.android.art/lib64/libart.so (void art::StackVisitor::WalkStack<(art::StackVisitor::CountTransitions)0>(bool)+5464) (BuildId: 56e704c544e6c624201be2ab4933e853) 09-15 22:56:28.757 15103 15103 F DEBUG : #2 pc 00000000005a0370 /apex/com.android.art/lib64/libart.so (art::JNI<true>::FindClass(_JNIEnv*, char const*)+480) (BuildId: 56e704c544e6c624201be2ab4933e853) 09-15 22:56:28.757 15103 15103 F DEBUG : #3 pc 00000000005c8948 /apex/com.android.art/lib64/libart.so (art::(anonymous namespace)::CheckJNI::FindClass(_JNIEnv*, char const*) (.__uniq.99033978352804627313491551960229047428.llvm.5591279935177935698)+228) (BuildId: 56e704c544e6c624201be2ab4933e853) 09-15 22:56:28.757 15103 15103 F DEBUG : dotnet#4 pc 000000000004de28 /data/app/~~aJedheWQLPfk1ulUOfKVyg==/Mono.Android.NET_Tests-XvAL5W7BvZDwkEbYfmLTIQ==/lib/arm64/libmonodroid.so (java_interop_jnienv_find_class+84) (BuildId: a92c56b31adcb233a4674b5eb523c0aaa67a811d) 09-15 22:56:28.757 15103 15103 F DEBUG : dotnet#5 pc 000000000000b220 <anonymous:705fcb1000>

It won't fix the failure, but extra logging might be useful at some point. The current failure is: droid.NET_Test: java_vm_ext.cc:570] JNI DETECTED ERROR IN APPLICATION: use of invalid jobject 0x7100941bb830 backtrace: #00 pc 00000000000943f8 /apex/com.android.runtime/lib64/bionic/libc.so (syscall+24) (BuildId: a08a19770d6696739c847e29c3f5f650) #1 pc 0000000000097146 /apex/com.android.runtime/lib64/bionic/libc.so (abort+182) (BuildId: a08a19770d6696739c847e29c3f5f650) #2 pc 000000000055321f /apex/com.android.runtime/lib64/libart.so (art::Runtime::Abort(char const*)+2399) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) #3 pc 000000000000c873 /system/lib64/libbase.so (android::base::LogMessage::~LogMessage()+611) (BuildId: 40d2b536dbf0730fdc31abd2b469f94f) dotnet#4 pc 00000000003ede64 /apex/com.android.runtime/lib64/libart.so (art::JavaVMExt::JniAbort(char const*, char const*)+1604) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) dotnet#5 pc 00000000003ee16a /apex/com.android.runtime/lib64/libart.so (art::JavaVMExt::JniAbortF(char const*, char const*, ...)+234) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) dotnet#6 pc 00000000005adf7b /apex/com.android.runtime/lib64/libart.so (art::Thread::DecodeJObject(_jobject*) const+875) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) dotnet#7 pc 00000000003def7b /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::ScopedCheck::CheckInstance(art::ScopedObjectAccess&, art::(anonymous namespace)::ScopedCheck::InstanceKind, _jobject*, bool)+91) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) dotnet#8 pc 00000000003de1e5 /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::ScopedCheck::CheckPossibleHeapValue(art::ScopedObjectAccess&, char, art::(anonymous namespace)::JniValueType)+485) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) dotnet#9 pc 00000000003de2d4 /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::ScopedCheck::CheckPossibleHeapValue(art::ScopedObjectAccess&, char, art::(anonymous namespace)::JniValueType)+724) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) dotnet#10 pc 00000000003dd712 /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::ScopedCheck::Check(art::ScopedObjectAccess&, bool, char const*, art::(anonymous namespace)::JniValueType*)+690) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) dotnet#11 pc 00000000003e28c0 /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::CheckJNI::CheckCallArgs(art::ScopedObjectAccess&, art::(anonymous namespace)::ScopedCheck&, _JNIEnv*, _jobject*, _jclass*, _jmethodID*, art::InvokeType, art::(anonymous namespace)::VarArgs const*)+160) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) dotnet#12 pc 00000000003e1a9e /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::CheckJNI::CallMethodV(char const*, _JNIEnv*, _jobject*, _jclass*, _jmethodID*, __va_list_tag*, art::Primitive::Type, art::InvokeType)+910) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) dotnet#13 pc 00000000003cf551 /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::CheckJNI::CallObjectMethod(_JNIEnv*, _jobject*, _jmethodID*, ...)+177) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2) dotnet#14 pc 00000000000013ec /data/app/Mono.Android.NET_Tests--O9vgexkYeCx3nX-AuvLTQ==/split_config.x86_64.apk!libreuse-threads.so (offset 0xa8d000) (BuildId: 562d86d81ebdd3bb6b7528e2a9235ff84827294e) dotnet#15 pc 0000000000100fce /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+30) (BuildId: a08a19770d6696739c847e29c3f5f650) dotnet#16 pc 0000000000098fe7 /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+55) (BuildId: a08a19770d6696739c847e29c3f5f650)

…otnet#7732) Fixes: dotnet#7335 Context: d236af5 Commit d236af5 introduced embedded assembly compression, using LZ4, which speeds up startup and reduces final package size. Assemblies are compressed at build time and, at the same time, pre- allocated buffers for the **decompressed** data are allocated in `libxamarin-app.so`. The buffers are then passed to the LZ4 APIs, all threads using the same output buffer. The assumption was that we can do fine without locking as even if overlapped decompression happens, the output data will be the same and so even if two threads do the same thing at the same time, the data will be valid at all times, so long as at least one thread completes the decompression. This assumption proved to be **largely** true, but it appears that in high concurrency cases it is possible that the data in the decompression buffer differs. This can result in app crashes: A/libc: Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 3092 (.NET ThreadPool), pid 2727 (myapp.name) A/DEBUG: pid: 2727, tid: 3092, name: .NET ThreadPool >>> myapp.name <<< A/DEBUG: #1 pc 0000000000029b1c /data/app/myapp.name-B9t_3dF9i8mDxJEKodZw5w==/split_config.arm64_v8a.apk!libmono-android.release.so (offset 0x103d000) (xamarin::android::internal::MonodroidRuntime::mono_log_handler(char const*, char const*, char const*, int, void*)+144) (BuildId: 29c5a3805a0bedee1eede9b6668d7c676aa63371) A/DEBUG: #2 pc 00000000002680bc /data/app/myapp.name-B9t_3dF9i8mDxJEKodZw5w==/split_config.arm64_v8a.apk!libmonosgen-2.0.so (offset 0x109b000) (BuildId: 4a5dd4396e8816b7f69881838bd549285213d53b) A/DEBUG: #3 pc 00000000002681e8 /data/app/myapp.name-B9t_3dF9i8mDxJEKodZw5w==/split_config.arm64_v8a.apk!libmonosgen-2.0.so (offset 0x109b000) (BuildId: 4a5dd4396e8816b7f69881838bd549285213d53b) A/DEBUG: dotnet#4 pc 000000000008555c /data/app/myapp.name-B9t_3dF9i8mDxJEKodZw5w==/split_config.arm64_v8a.apk!libmonosgen-2.0.so (offset 0x109b000) (mono_metadata_string_heap+188) (BuildId: 4a5dd4396e8816b7f69881838bd549285213d53b) … My guess is that LZ4 either uses the output buffer as a scratchpad area when decompressing or that it initializes/modifies the buffer before writing actual data in it. With overlapped decompression, it may lead to one thread overwriting valid data previously written by another thread, so that when the latter returns the buffer it thought to have had valid data may contain certain bytes temporarily overwritten by the decompression session in the other, still running, thread. It may happen that MonoVM reads the corrupted data just when it is still invalid (before the still running decompression session actually writes the valid data), a classic race condition. To fix this, the decompression block is now protected with a startup- aware mutex. Mutex will be held only after the initial startup phase is completed, so there should not be much loss of startup performance.

Changes: dotnet/installer@9962c6a...779a644 Changes: dotnet/linker@4b3f78c...c790896 Changes: dotnet/runtime@5da4a9e...ddb6988 Changes: dotnet/emsdk@66b9845...5b46122 Updates: * Microsoft.Dotnet.Sdk.Internal: from 8.0.100-alpha.1.23063.11 to 8.0.100-alpha.1.23070.23 * Microsoft.NET.ILLink.Tasks: from 8.0.100-1.23055.2 to 8.0.100-1.23067.1 * Microsoft.NETCore.App.Ref: from 8.0.0-alpha.1.23058.2 to 8.0.0-alpha.1.23070.1 * Microsoft.NET.Workload.Emscripten.net7.Manifest-8.0.100: from 8.0.0-alpha.1.22620.1 to 8.0.0-alpha.1.23066.1 ~~ Other Changes ~~ * Update `.apkdesc` files for app size changes. * Use .jar files from the .NET runtime pack (dotnet#7665) Since [dotnet/runtime#77386][0] has been merged, .NET will require a certain class from `libSystem.Security.Cryptography.Native.Android.jar` that will be located in the runtime pack files. [0]: dotnet/runtime#77386 * Disambiguate `.jar` files from Mono runtime packs. We were getting the build error: error JAVA0000: Caused by: com.android.tools.r8.internal.f: Type net.dot.android.crypto.DotnetProxyTrustManager is defined multiple times This `.jar` file is contained in each runtime pack (4 architectures) gives us 4 `.jar` files! We can pass in these files to the `<ProcessAssemblies/>` MSBuild task. We also filter them based on `%(NuGetPackageId)`, so that any random `.jar` file doesn't get added to `@(AndroidJavaLibrary)`. I renamed the `IsFrameworkAssembly()` method to `IsFromAKnownRuntimePack()` to make this more clear in the existing code. * Update `proguard_xamarin.cfg` for .NET 8. Apps using `$(AndroidLinkTool)` of r8, now need to preserve: -keep class net.dot.android.crypto.DotnetProxyTrustManager { *; <init>(...); } Otherwise we run into a crash when this type isn't present, such as: 01-26 23:59:19.855 8684 8684 F DEBUG : #2 pc 00000000000191d6 /data/app/Mono.Android.NET_Tests-cpTzt8Q9KwgS-znzkuAdNQ==/split_config.x86_64.apk!libSystem.Security.Cryptography.Native.Android.so (offset 0xe7000) (JNI_OnLoad+31302) (BuildId: 7d9e4013a9dd99810070587ab42956703fef69f9) Co-authored-by: Jonathan Peppers <[email protected]> Co-authored-by: Šimon Rozsíval <[email protected]>

…otnet#7732) Fixes: dotnet#7335 Context: d236af5 Commit d236af5 introduced embedded assembly compression, using LZ4, which speeds up startup and reduces final package size. Assemblies are compressed at build time and, at the same time, pre- allocated buffers for the **decompressed** data are allocated in `libxamarin-app.so`. The buffers are then passed to the LZ4 APIs, all threads using the same output buffer. The assumption was that we can do fine without locking as even if overlapped decompression happens, the output data will be the same and so even if two threads do the same thing at the same time, the data will be valid at all times, so long as at least one thread completes the decompression. This assumption proved to be **largely** true, but it appears that in high concurrency cases it is possible that the data in the decompression buffer differs. This can result in app crashes: A/libc: Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 3092 (.NET ThreadPool), pid 2727 (myapp.name) A/DEBUG: pid: 2727, tid: 3092, name: .NET ThreadPool >>> myapp.name <<< A/DEBUG: #1 pc 0000000000029b1c /data/app/myapp.name-B9t_3dF9i8mDxJEKodZw5w==/split_config.arm64_v8a.apk!libmono-android.release.so (offset 0x103d000) (xamarin::android::internal::MonodroidRuntime::mono_log_handler(char const*, char const*, char const*, int, void*)+144) (BuildId: 29c5a3805a0bedee1eede9b6668d7c676aa63371) A/DEBUG: #2 pc 00000000002680bc /data/app/myapp.name-B9t_3dF9i8mDxJEKodZw5w==/split_config.arm64_v8a.apk!libmonosgen-2.0.so (offset 0x109b000) (BuildId: 4a5dd4396e8816b7f69881838bd549285213d53b) A/DEBUG: #3 pc 00000000002681e8 /data/app/myapp.name-B9t_3dF9i8mDxJEKodZw5w==/split_config.arm64_v8a.apk!libmonosgen-2.0.so (offset 0x109b000) (BuildId: 4a5dd4396e8816b7f69881838bd549285213d53b) A/DEBUG: dotnet#4 pc 000000000008555c /data/app/myapp.name-B9t_3dF9i8mDxJEKodZw5w==/split_config.arm64_v8a.apk!libmonosgen-2.0.so (offset 0x109b000) (mono_metadata_string_heap+188) (BuildId: 4a5dd4396e8816b7f69881838bd549285213d53b) … My guess is that LZ4 either uses the output buffer as a scratchpad area when decompressing or that it initializes/modifies the buffer before writing actual data in it. With overlapped decompression, it may lead to one thread overwriting valid data previously written by another thread, so that when the latter returns the buffer it thought to have had valid data may contain certain bytes temporarily overwritten by the decompression session in the other, still running, thread. It may happen that MonoVM reads the corrupted data just when it is still invalid (before the still running decompression session actually writes the valid data), a classic race condition. To fix this, the decompression block is now protected with a startup- aware mutex. Mutex will be held only after the initial startup phase is completed, so there should not be much loss of startup performance.

) Context: 929e701 Context: ce2bc68 Context: dotnet#7473 Context: dotnet#8155 The managed linker can produce assemblies optimized for the target `$(RuntimeIdentifier)` (RID), which means that they will differ between different RIDs. Our "favorite" example of this is `IntPtr.Size`, which is inlined by the linker into `4` or `8` when targeting 32-bit or 64-bit platforms. (See also dotnet#7473 and 929e701.) Another platform difference may come in the shape of CPU intrinsics which will change the JIT-generated native code in ways that will crash the application if the assembler instructions generated for the intrinsics aren't supported by the underlying processor. In addition, the per-RID assemblies will have different [MVID][0]s and **may** have different type and method metadata token IDs, which is important because typemaps *use* type and metadata token IDs; see also ce2bc68. All of this taken together invalidates our previous assumption that all the managed assemblies are identical. "Simply" using `IntPtr.Size` in an assembly that contains `Java.Lang.Object` subclasses will break things. This in turn could cause "mysterious" behavior or crashes in Release applications; see also Issue dotnet#8155. Prevent the potential problems by processing each per-RID assembly separately and output correct per-RID LLVM IR assembly using the appropriate per-RID information. Additionally, during testing I found that for our use of Cecil within `<GenerateJavaStubs/>` doesn't consistently remove the fields, delegates, and methods we remove in `MarshalMethodsAssemblyRewriter` when marshal methods are enabled, or it generates subtly broken assemblies which cause **some** applications to segfault at run time like so: I monodroid-gc: 1 outstanding GREFs. Performing a full GC! F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x8 in tid 12379 (t6.helloandroid), pid 12379 (t6.helloandroid) F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** F DEBUG : Build fingerprint: 'google/raven_beta/raven:14/UPB3.230519.014/10284690:user/release-keys' F DEBUG : Revision: 'MP1.0' F DEBUG : ABI: 'arm64' F DEBUG : Timestamp: 2023-07-04 22:09:58.762982002+0200 F DEBUG : Process uptime: 1s F DEBUG : Cmdline: com.microsoft.net6.helloandroid F DEBUG : pid: 12379, tid: 12379, name: t6.helloandroid >>> com.microsoft.net6.helloandroid <<< F DEBUG : uid: 10288 F DEBUG : tagged_addr_ctrl: 0000000000000001 (PR_TAGGED_ADDR_ENABLE) F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0000000000000008 F DEBUG : Cause: null pointer dereference F DEBUG : x0 0000000000000000 x1 0000007ba1401af0 x2 00000000000000fa x3 0000000000000001 F DEBUG : x4 0000007ba1401b38 x5 0000007b9f2a8360 x6 0000000000000000 x7 0000000000000000 F DEBUG : x8 ffffffffffc00000 x9 0000007b9f800000 x10 0000000000000000 x11 0000007ba1400000 F DEBUG : x12 0000000000000000 x13 0000007ba374ad58 x14 0000000000000000 x15 00000013ead77d66 F DEBUG : x16 0000007ba372f210 x17 0000007ebdaa4a80 x18 0000007edf612000 x19 000000000000001f F DEBUG : x20 0000000000000000 x21 0000007b9f2a8320 x22 0000007b9fb02000 x23 0000000000000018 F DEBUG : x24 0000007ba374ad08 x25 0000000000000004 x26 0000007b9f2a4618 x27 0000000000000000 F DEBUG : x28 ffffffffffffffff x29 0000007fc592a780 F DEBUG : lr 0000007ba3701f44 sp 0000007fc592a730 pc 0000007ba3701e0c pst 0000000080001000 F DEBUG : 8 total frames F DEBUG : backtrace: F DEBUG : #00 pc 00000000002d4e0c /data/app/~~Av24J15xbf20XdrY3X2_wA==/com.microsoft.net6.helloandroid-4DusuNWIAkz1Ssi7fWVF-g==/lib/arm64/libmonosgen-2.0.so (BuildId: 761134f2369377582cc3a8e25ecccb43a2e0a877) F DEBUG : #1 pc 00000000002c29e8 /data/app/~~Av24J15xbf20XdrY3X2_wA==/com.microsoft.net6.helloandroid-4DusuNWIAkz1Ssi7fWVF-g==/lib/arm64/libmonosgen-2.0.so (BuildId: 761134f2369377582cc3a8e25ecccb43a2e0a877) F DEBUG : #2 pc 00000000002c34bc /data/app/~~Av24J15xbf20XdrY3X2_wA==/com.microsoft.net6.helloandroid-4DusuNWIAkz1Ssi7fWVF-g==/lib/arm64/libmonosgen-2.0.so (BuildId: 761134f2369377582cc3a8e25ecccb43a2e0a877) F DEBUG : #3 pc 00000000002c2254 /data/app/~~Av24J15xbf20XdrY3X2_wA==/com.microsoft.net6.helloandroid-4DusuNWIAkz1Ssi7fWVF-g==/lib/arm64/libmonosgen-2.0.so (BuildId: 761134f2369377582cc3a8e25ecccb43a2e0a877) F DEBUG : dotnet#4 pc 00000000002be0bc /data/app/~~Av24J15xbf20XdrY3X2_wA==/com.microsoft.net6.helloandroid-4DusuNWIAkz1Ssi7fWVF-g==/lib/arm64/libmonosgen-2.0.so (BuildId: 761134f2369377582cc3a8e25ecccb43a2e0a877) F DEBUG : dotnet#5 pc 00000000002bf050 /data/app/~~Av24J15xbf20XdrY3X2_wA==/com.microsoft.net6.helloandroid-4DusuNWIAkz1Ssi7fWVF-g==/lib/arm64/libmonosgen-2.0.so (BuildId: 761134f2369377582cc3a8e25ecccb43a2e0a877) F DEBUG : dotnet#6 pc 00000000002a53a4 /data/app/~~Av24J15xbf20XdrY3X2_wA==/com.microsoft.net6.helloandroid-4DusuNWIAkz1Ssi7fWVF-g==/lib/arm64/libmonosgen-2.0.so (mono_gc_collect+44) (BuildId: 761134f2369377582cc3a8e25ecccb43a2e0a877) F DEBUG : dotnet#7 pc 000000000000513c <anonymous:7ec716b000> This is because we generate Java Callable Wrappers over a set of original (linked or not) assemblies, then we scan them for classes derived from `Java.Lang.Object` and use that set as input to the marshal methods rewriter, which makes the changes (generates wrapper methods, decorates wrapped methods with `[UnmanagedCallersOnly]`, removes the old delegate methods as well as delegate backing fields) to all the `Java.Lang.Object` subclasses, then writes the modified assembly to a `new/<assembly.dll>` location (efa14e2), followed by copying the newly written assemblies back to the original location. At this point, we have the results returned by the subclass scanner in memory and **new** versions of those types on disk, but they are out of sync, since the types in memory refer to the **old** assemblies, but AOT is ran on the **new** assemblies which have a different layout, changed MVIDs and, potentially, different type and method token IDs (because we added some methods, removed others etc) and thus it causes the crashes at the run time. The now invalid set of "old" types is passed to the typemap generator. This only worked by accident, because we (incorrectly) used only the first linked assembly which happened to be the same one passed to the JLO scanner and AOT - so everything was fine at the execution time. Address this by *disabling* LLVM Marshal Methods (8bc7a3e) for .NET 8, setting `$(AndroidEnableMarshalMethods)`=False by default. We'll attempt to fix these issues for .NET 9. [0]: https://learn.microsoft.com/dotnet/api/system.reflection.module.moduleversionid?view=net-7.0

[xaprepare] Update ExternalGitDependency usage

edda1d5

Allows a non-authorized https-based clone for local use cases, and cleans up various logging events to ensure we don't leak secrets. Also includes some minor azure-pipelines.yaml cleanup.

pjcollins requested a review from grendello as a code owner June 6, 2019 17:58

grendello merged commit 1aa491e into grendello:xa/bootstrap Jun 6, 2019

pjcollins deleted the externalgit-and-format branch June 6, 2019 18:10

grendello added a commit that referenced this pull request Jul 17, 2023

oops #2

c1cabbc

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[xaprepare] Update ExternalGitDependency usage #2

[xaprepare] Update ExternalGitDependency usage #2

pjcollins commented Jun 6, 2019

[xaprepare] Update ExternalGitDependency usage #2

[xaprepare] Update ExternalGitDependency usage #2

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pjcollins commented Jun 6, 2019