Analyze or collect Xamarin stack traces for ANR in

Question

We are getting some stack traces for "background" (on broadcast reciever) ANR's in google play console. But there are all looking something like this:

"main" prio=5 tid=1 Native
  | group="main" sCount=1 dsCount=0 obj=0x7523b718 self=0xec085400
  | sysTid=13422 nice=0 cgrp=bg_non_interactive sched=0/0 handle=0xef6bb534
  | state=S schedstat=( 0 0 0 ) utm=74 stm=24 core=7 HZ=100
  | stack=0xff1ec000-0xff1ee000 stackSize=8MB
  | held mutexes=
  #00  pc 0000000000017520  /system/lib/libc.so (syscall+28)
  #01  pc 0000000000047cbd  /system/lib/libc.so (_ZL33__pthread_mutex_lock_with_timeoutP24pthread_mutex_internal_tbPK8timespec+520)
  #02  pc 000000000017e45c  /data/app/com.company.package-2/lib/arm/libmonosgen-2.0.so (???)

so we cannot get any useful information of what happens - analysis of code gives nothing. Is there any way of collecting C# stacks on ANR event?

Answer 1

There is a package named Xamarin.ANRWatchDog that detects Android ANR errors (Application Not Responding) available via Nuget or from Github. It is a thread that watches for ANRs and then raises an error with stack traces for all of the threads. It was ported to Xamarin from Salomon Brys's ANR-WatchDog.