dotnet/coreclr

This repo contains the .NET Core runtime, called CoreCLR. It is an execution engine for .NET apps, performing functions such as IL byte code loading, compilation to machine code and garbage collection. The repo contains the complete up-to-date CoreCLR codebase.

Brent Arias

@brentarias

@john-cullen I learned originally from Jeffrey Richter when he was writing back in the .Net 3.5 days-ish. For .net core the fusion log viewer I don't think works...but I know there is an environment variable you can set that will cause .net core to start spewing out TONS of log info to console-out that tells you in nauseating detail what assemblies it is loading and where it is searching for them.

Brent Arias

@brentarias

If I have a JSON blob like this:

{
 'foo' : {'hey' : 40},
 'boo' : {'there' :50}
}

...what is the fastest way to load this into a dictionary<string,string> with entries like "foo":"{'hey' :40}". So ya, I don't want the object value de-serialized...I want it kept as a string.

Joseph Musser

@jnm2

I think the new .NET Core JSON APIs let you obtain objects as strings and UTF-8 byte spans, but I don't remember how you would do it.

Alex Yakunin

@alexyakunin

Just want to thank anyone who worked on .NET 5 - the perf. boost I see so far is beyond any expectations: https://twitter.com/alexyakunin/status/1326438626901729280

ChinnasamyM

@ChinnasamyM

Yes. Great and awesome efforts. Thanks @alexyakunin for pointing out this. Good explanatory samples

Edinei Cavalcanti

@neiesc

@alexyakunin thanks

Chris Ochs

@gamemachine

What is the idiomatic way to log by application feature? Using Microsoft.Extensions.Logging but in a very custom server setup. So we have an AppLogger class with static methods that proxy to the system wide logger. We have no good reason for separate logger instances. So I threw together a LogScoped method that takes an AppLogScope enum. That grabs a LogLevel constant defined for the scope.

DI would be nice but it's not so simple, multiple context's we would have to create injectors for. So atm DI for logging just not a good bang for buck

Chris Delpire

@Delpire

If I have a .NET Core exe referencing a .NET Framework Dependency, and that .NET framework dependency has another .NET framework dependency, is it possible to redirect that 3rd dependency. We can't use GAC/policy files, but is there some kind of file I can use to do a .NET Framework assembly binding redirect even if I am running in .NET Core 3.1?

Hugh Gleaves

@Korporal

If I install this later, will it automatically also install .Net 5? provide me with C# 9 support?

https://docs.microsoft.com/en-us/visualstudio/releases/2019/release-notes#16.8.1

Carlo Kok

@carlokok

Does anyone know if the runtime actively will block a byref<sometype> in a struct / class or if it's working (unsafely of course)?

Joe4evr

@Joe4evr

you mean as a field?

if so, then yes it'll be blocked, because there is no way to actually express that in IL today

the runtime team has been wanting to introduce something in that space for some time now, and the lang team has just put the corresponding feature in the 10.0 Working Set (which isn't a guarantee of anything, but it does mean they're going to look into it)

Joe4evr

@Joe4evr

also, should the feature make it in next release, then it wouldn't even require unsafe, but it will be limited to use in ref structs (since the compiler needs to guarantee the wrapper object doesn't outlive the ref it points to)

Carlo Kok

@carlokok

hm? Surely you can express it?

Joe4evr

@Joe4evr

nope https://github.com/dotnet/csharplang/issues/1147#issuecomment-347074271

Span uses an internal type for a hack workaround, but the runtime team wants to remove that implementation detail

Carlo Kok

@carlokok

hrmm that's nasty. I expected the typesig for byref to just work here.

And of course ByREference<T> is hidden so I can't reuse it.

Joe4evr

@Joe4evr

nor should you

Carlo Kok

@carlokok

yeah well...

Joe4evr

@Joe4evr

like I said, the moment the runtime supports ref fields, ByRef<T> is gonna be removed entirely

Carlo Kok

@carlokok

I need to support .net framework 4.* anyway. so that's not a real option to wait for

I'm trying to model rust's "ref" semantics on the clr

I don't care much if it's safe or not

Joe4evr

@Joe4evr

then I'm afraid you're out of luck

Carlo Kok

@carlokok

Obviously, pointers are a valid option.

But they would require pinning.

Joe4evr

@Joe4evr

hmmmm....

Carlo Kok

@carlokok

This is going to be an interesting project

Joe4evr

@Joe4evr

if you weren't married to 4.X, you could use the new GC APIs to allocate your objects on the Pinned Heap (so there's no need to manually pin)

Carlo Kok

@carlokok

One (other) option would be to use the regular allocation apis (marshal.alloc*) as rust doesn't do interfaces and classes, only structs.

But it would become a c++ level language pretty quickly.

Joe4evr

@Joe4evr

¯\_(ツ)_/¯

Carlo Kok

@carlokok

hahah :) sorry

It's getting a bit off topic

thanks for the help

Joe4evr

@Joe4evr

maybe build your core API in C++/CLI then? :laughing:

Carlo Kok

@carlokok

i have a compiler with vb, c#, pascal, java, go as frontends running on .net

I want to see if it's possible to map rust now

Joe4evr

@Joe4evr

yea.... I sincerely doubt it

Carlo Kok

@carlokok

oh I'll win this battle; the real question is how fast it's going to be

masonwheeler

@masonwheeler

Oh hey @carlokok, haven't seen you in a while!

Carlo Kok

@carlokok

yo @masonwheeler. Been busy yeah

masonwheeler

@masonwheeler

Well, welcome to Dotnet gitter :smile:

John Cullen

@john-cullen

is there a simple way to return an Expression<Func<T>> instead of a Func<T> from an expressiontree or will I need to do something like Expression.Call(Expression, "Lambda", Expression.Lambda(...etc)))

mogo-edenpark

@mogo-edenpark

do you guys know how to get the password from the table as a normal string?

I use .net framework core 3.1

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