[runtime] Add pipeline to convert managed exception into telemetry format (#10133)

[runtime] Add pipeline to convert managed exception into telemetry format (#10133)

* [runtime] Expose merp sender to icall

* [runtime] Add initial support for Exc -> Telemetry

In order to allow managed crash reporting using the existing telemetry
format, I have added initial support for converting a MonoException into
a json blob for telemetry.

* [runtime] Zero out stack memory for mono-state dumper

* [runtime] Add test for managed telemetry reporting

To test the proprietary bits, you must first have a copy of MERP
installed somewhere.

Then run the following test:

using System;
using System.Reflection;

public class MinimalTelemetry {

	static MinimalTelemetry ()
	{
		var merp_path = "/xxx/xxx/xxx/Microsoft Error Reporting.app";
		var monoType = Type.GetType ("Mono.Runtime", false);
		var m = monoType.GetMethod("EnableMicrosoftTelemetry", BindingFlags.NonPublic | BindingFlags.Static);
		var m_params = new object[] {"com.xamarin.MinimalTelemetry", "Test.Xam.MinimalTelemetry", "1337001", merp_path, "AppleAppCrash", "/Library/Frameworks/Mono.framework/Versions/Current/bin/mono"};
		m.Invoke(null, m_params);

		AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(HandleException);
	}

	public static void HandleException (object sender, UnhandledExceptionEventArgs e)
	{
		var exc = e.ExceptionObject as Exception;

		var monoType = Type.GetType ("Mono.Runtime", false);
		var send = monoType.GetMethod("SendExceptionToTelemetry", BindingFlags.NonPublic | BindingFlags.Static);
		var send_params = new object[] {exc};
		send.Invoke(null, send_params);

		// Now the MERP GUI should pop up
		// Click "More Information"
		// You should see something like this:
		// {
		//  "payload" : {
		//  "protocol_version" : "0.0.1",
		//  "configuration" : {
		//    "version" : "5.19.0 (managed_telemetry_pipeline/d342c73e320 Wed Aug 15 14:40:40 EDT 2018)",
		//    "tlc" : "normal",
		//    "sigsgev" : "altstack",
		//    "notifications" : "kqueue",
		//    "architecture" : "amd64",
		//    "disabled_features" : "none",
		//    "smallconfig" : "disabled",
		//    "bigarrays" : "disabled",
		//    "softdebug" : "enabled",
		//    "interpreter" : "enabled",
		//    "llvm_support" : "disabled",
		//    "suspend" : "hybrid"
		//  },
		//  "memory" : {
		//    "Resident Size" : "16306176",
		//    "Virtual Size" : "4491988992",
		//    "minor_gc_time" : "0",
		//    "major_gc_time" : "0",
		//    "minor_gc_count" : "0",
		//    "major_gc_count" : "0",
		//    "major_gc_time_concurrent" : "0"
		//  },
		//  "threads" : [
		//    {
		//      "is_managed" : false,
		//      "managed_thread_ptr" : "0x0",
		//      "thread_info_addr" : "0x0",
		//      "native_thread_id" : "0x0",
		//      "managed_frames" : [
		//        {
		//          "is_managed" : "true",
		//          "guid" : "4F72FB1B-1E99-47BA-91CE-9515783DC174",
		//          "token" : "0x6000004",
		//          "native_offset" : "0x6a",
		//          "il_offset" : "0x00000"
		//        }
		//      ]
		//    }
		//  ]},
		//  "parameters" : {
		//    "ApplicationBundleId:" : "Test.Xam.MinimalTelemetry",
		//    "ApplicationVersion:" : "1337001",
		//    "ApplicationBitness:" : "x64",
		//    "ApplicationName:" : "com.xamarin.MinimalTelemetry",
		//    "BlameModuleName:" : "Mono Exception",
		//    "BlameModuleVersion:" : "5.19.0 (managed_telemetry_pipeline/d342c73e320 Wed Aug 15 14:40:40 EDT 2018)",
		//    "BlameModuleOffset:" : "0x0",
		//    "ExceptionType:" : "0x02000000",
		//    "StackChecksum:" : "0x60114aa",
		//    "StackHash:" : "0x6011514",
		//    "OSVersion:" : "17.4.0",
		//    "LanguageID:" : "0x7f",
		//    "SystemManufacturer:" : "apple",
		//    "SystemModel:" : "MacBookPro14,3",
		//    "EventType:" : "AppleAppCrash"
		//    }
		//  }

	}

	public static void Main (string[] args)
	{
		//AppDomain.CurrentDomain.LoadFrom ("something that's not a valid path")
		throw new Exception ("MinimalTelemetrybar MinimalTelemetrybar");
	}
}

* [runtime] Create more ergonomic API for Exc to Telemetry

* [runtime] Consistently zero summarizer state memory

* [runtime] Stub out exception summarizer when crash reporting is disabled

* [runtime] Add interpreter support for walking Exception stacks