I’m using a

StableRef

to allow a

frozen

object to hold onto a non-frozen object, so that I can create an object that I can create a wrapping object that provides an interface that’s responsible for ensuring access on the right thread. This creates a memory leak though, as

StableRef

has to be `dispose`ed when it’s done. Is there any way to get around disposing

StableRef

so that I don’t have to add a

dispose()

fun on every single one of these interfaces? Is there another way to do this without using

StableRef

?

Looks increasingly likely that the memory leaks in my Kotlin Native program come from one or more third party Kotlin Native libraries. Below are the libraries being used by the program: • Ktor Client Curl 1.3.2 (io.ktor:ktor-client-curl:1.3.2) • Ktor Client Serialization Native 1.3.2 (io.ktor:ktor-client-serialization-native:1.3.2) • KotlinX Serialization Runtime Common 0.20.0 (org.jetbrains.kotlinx:kotlinx-serialization-runtime-common:0.20.0) • Ktor Client Core 1.3.2 (io.ktor:ktor-client-core:1.3.2) • Ktor Client Serialization 1.3.2 (io.ktor:ktor-client-serialization:1.3.2) • Kotlin Common Standard Library 1.3.71

@olonho I want to write a class that doesn’t have to worry about threading concerns at all. It only is ever used by one thread. Then I want to create a wrapper for that class (eventually I want to generate it with a compiler plugin, but for now I’m manually writing it), that exposes the same API, but via suspend functions, and is asynchronous, that delegates to the original class, mostly via

withContext

calls. This means that the wrapper will need to be frozen, and the core class that the wrapper delegates too will need to not be frozen. The wrapper has to have a reference to the core class though. How can I accomplish this? Someone mentioned using a

StableRef

, which seems like it will do the job, but then it has to be disposed in order to not cause a memory leak for a reference. That means that a

dispose

function has to be added to my wrapper. I’d like to not pollute my interface and require an API like that. Is there another way?

Can I run a macOS dispatchLoop from

macosX64Test

? I tried calling

dispatch_main

manually but it gave me a

Illegal instruction: 4

How can i reduce iOS app size? Empty project takes 40mb on my iPhone

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When updating to use kotlin 1.3.71 from 1.3.61 I switched to declaring generics with

tasks.withType<KotlinCompile> {
  kotlinOptions.freeCompilerArgs += "-Xobjc-generics"
}

instead of

extraOpts("-Xobjc-generics")

, but I am seeing types returned as Any where I did not before. Any tips on the right way to enable generics for 1.3.71?

We generated a .framework that worked fine when compiled in Xcode10 but now doesn't compile anymore in Xcode11. Anyone with hints? Thanks in advance!

e: Compilation failed: GC overhead limit exceeded * Source files: * Compiler version info: Konan: 1.3.71 / Kotlin: 1.3.71 * Output kind: FRAMEWORK e: java.lang.OutOfMemoryError: GC overhead limit exceeded

I’ve added an extension function in Kotlin to an objc framework. It’s showing up in Swift code though as a function that you have to pass an instance into. Here is the objc header:

__attribute__((objc_subclassing_restricted))
__attribute__((swift_name("RallyAbTestKt")))
@interface RATRallyAbTestKt : RATBase
+ (void)getExperimentGroup:(id<RATRallyAbTest>)receiver name:(NSString *)name callback:(void (^)(NSString *))callback __attribute__((swift_name("getExperimentGroup(_:name:callback:)")));
+ (void)doInit:(id<RATRallyAbTest>)receiver appName:(NSString *)appName userIdentifier:(NSString *)userIdentifier experiments:(NSArray<RATExperiment *> *)experiments mode:(RATAbTestMode *)mode callback:(void (^)(NSArray<RATExperimentGroup *> *))callback __attribute__((swift_name("doInit(_:appName:userIdentifier:experiments:mode:callback:)")));
@end;

The interop documentation shows that it should show up as an extension in Swift. Do I have to do something special to get that to work?

In a c interop, does anyone know why I am getting the error:

Unresolved reference: __builtin_va_list

? I am not sure I understand why this error occurs. The generated Kotlin file has this import:

import platform.builtin.__builtin_va_list

, but that import does not exist. Does anyone know why this problem occurs or has any workaround for it?

I’m encountering a

MutabilityException

when using the

native-mt

version of coroutines with

Flow

. I’ve been stuck on this all day and it doesn’t make a ton of sense to me. I’ve re-created the issue on a small scale in the form of tests, one with the exception, one without. It’s difficult to tell if I’m being dense, or if there is a bug that I’m hitting. For some reason the tests never complete when both are in the file. If you comment out

test2

, run

test1

, let it complete, and then check the stdout from the test, you’ll see the error.

test1

has the exception, and

test2

doesn’t. https://gist.github.com/ScottPierce/0e687021f34d779708d1f32bfc81e8e2

Hi guys, I wanted to ask what is the current status for using

protobuf

with

Kotlin/Native

? If anybody, can provide some useful links for this, I would be thankful.

hi all. anybody know how to fix error:

e: java.nio.file.NoSuchFileException: /Users/alex/Desktop/work_projects/my-project/dist/konan/konan.properties

?

Hi All, I am having a problem when compiling my project. This is the error:

Task :BcLib:cinteropRUAIos

Downloading native dependencies (LLVM, sysroot etc). This is a one-time action performed only on the first run of the compiler. Downloading dependency: https://download.jetbrains.com/kotlin/native/libffi-3.2.1-3-darwin-macos.tar.gz (72.6 kiB/72.6 kiB). Done. Extracting dependency: /Users/vnteumr/.konan/cache/libffi-3.2.1-3-darwin-macos.tar.gz into /Users/vnteumr/.konan/dependencies Downloading dependency: https://download.jetbrains.com/kotlin/native/clang-llvm-apple-8.0.0-darwin-macos.tar.gz (393.8 MiB/393.8 MiB). Done. Extracting dependency: /Users/vnteumr/.konan/cache/clang-llvm-apple-8.0.0-darwin-macos.tar.gz into /Users/vnteumr/.konan/dependencies e: /Users/vnteumr/workspace/bc-android/bc-kmp/BcLib/build/classes/kotlin/ios/main/BcLib-cinterop-RUA.klib-build/kotlin/com/ingenico/lar/bc/bc.kt: (31, 23): Unresolved reference: UIAxis e: /Users/vnteumr/workspace/bc-android/bc-kmp/BcLib/build/classes/kotlin/ios/main/BcLib-cinterop-RUA.klib-build/kotlin/com/ingenico/lar/bc/bc.kt: (1345, 78): Unresolved reference: UIAxis e: /Users/vnteumr/workspace/bc-android/bc-kmp/BcLib/build/classes/kotlin/ios/main/BcLib-cinterop-RUA.klib-build/kotlin/com/ingenico/lar/bc/bc.kt: (1437, 70): Unresolved reference: UIAxis It is very strange because the error happened when I was trying to generate a FatFramerkork. After the compile error, I rollback the changes I have done on gradle.build file . However, the error still happen after rollback. Then, I deleted all cache files (.gradle, .idea, .konan) and tried to build again. The same error happens. Have you faced this error? Do you know how to fix it?

I’m compiling a fat framework for iOS and the errors that I’m getting are obfuscated. How do I get non-obfuscated errors from a locally built

.framework

?

Is the Kotlin/native compiler smart enough to take non-caputuring lambdas and make them singleton instances?

Is there any chance I can make K/N work on Mac OS X 10.11 ? I currently get an error on loading

/usr/lib/libate.dylib

Platorm: iOS (mpp), kotlin:

1.3.71

, coroutines:

1.3.5-native-mt

, ktor:

1.3.2

. Can someone explain to me, how is this working: For now, this is not possible to do ktor calls in the background. I know that this is ktor's issue, but only when you are calling

HttpClient

from different threads on iOS (according to the github issues), and ktor handles this (does background calls) by itself. In my case, I do such calls only before, but anyway I got

InvalidMutabilityException

. How this is possible? A detailed description is below. I have the code like this:

class IssueReproduce: CoroutineScope {
	private val dispatcherUi = // on iOS: Dispatchers.Main
	private val dispatcherDefault = // on iOS: Dispatchers.Default
	private val job = SupervisorJob()
	private val api = SomeApi()
	
	override val coroutineContext = dispatcherUi + job

	/* ... */

    fun checkAuth() {
	    launch(coroutineContext) {
	    	// make some call in a background BEFORE
	        val token = withContext(dispatcherDefault) {
	            repo.getToken()
	        }

	        val response = try {
	            api.doAuth(token)
	        } catch (e: Throwable) {
	            // error: 
	            // kotlin.native.concurrent.InvalidMutabilityException
	            // mutation attempt of frozen io.ktor.client.request.HttpRequestPipeline@838cd448
	        }
	    }
	}
}

Where:

class SomeApi {
	private val client = HttpClient(/* ... */)

	suspend fun doAuth(token: String): SomeDataClass {
		return <http://client.post|client.post> {
			url(/* ... */)
			body = /* ... */
		}
	}
}

But, when I change code to this:

val token = /* withContext(dispatcherDefault) { */
	repo.getToken()
/* } */

i.e. when I make no calls in the background before calling ktor.HttpClient, all is ok and there are no errors. So, what I'm doing wrong? Removing

withContext(dispatcherDefault)

for precending code does the trick, but wrapping ktor calls with

withContext(coroutineContext)

or

withContext(dispatcherUi)

does not. How preceding code with the call in the background can affect the thread of the following code? And how to fix this? As I mentioned above, I tried to wrap ktor calls with the original thread, but it does not help.

This commit https://github.com/JetBrains/kotlin-native/pull/3487 re C++ was closed; I’m wondering if there is a “weeks”, “months”, “years” ballpark idea for creating C++/C#? (and I’m aware of the cppsharp solutions being used). Thanks! Addendum: And please feel free to openly chastise me if I’m asking in the wrong place 😉

I’m trying to release a library to my iOS team. The Debug version of the fat framework creates a DSYM folder, which is essential from my understanding to get desymbolicated stack traces. However, it’s also my understanding that the release version does certain optimizations in code. I want the optimizations, but I also want desymbolicated stack traces in production. Is this possible?

When building an iOS Framework, is it somehow possible to "restrict" the exposed symbols. For an exemple, disregard everything that is in a

*.internal

package ?

Hi friends, Wondering, if any of you have tried using Realm-Cocoa/Swift in Kotlin Native project? (Using cinterop or CocoaPods or whatever magic) I'm aware of the following issue :) https://github.com/realm/realm-java/issues/5727 Any other experience of using KMP in existing project with Realm would be very helpful... For now, the closest tactic we came up with is having models as interfaces in KMP with generic

Storage

and implementation of

Storage

in android/swift module with actual models... Which quite boring! Thanks in advance! 😉

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Is it somehow possible to "emulate" the multithreading behavior of K/N on the JVM ? Have the runtime throw on multithreaded accesses on non-freezed objects ? My dev experience is way better on the JVM (debugger & compile time mainly) so if I could catch the freeze exceptions there, that would save me a lot of time.

Has anyone seen something like this? I’ve got a Kotlin native framework but I’m getting an unexpected error.

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[RATExperiment initWithName:group:]: unrecognized selector sent to instance 0x600001180760'

I’m trying to add dependencies to a K/N project for the first time. In my build file I have the following structure:

kotlin {
    linuxArm32Hfp("projectname") {
        […]
    }

    sourceSets {
        projectnameMain {
            dependencies {
                implementation 'com.example.package:artifact-name:0.0.0'
            }
        }
    }
}

The string passed to

implementation

is highlighted in IntelliJ with this warning:

‘implementation’ cannot be applied to ‘(java.lang.String)’

Where do I put dependencies and how do I format them?

I am new to native development and was curious if we could use kotlin native to target windows xp. Thank you!

Hi, I just made a hello world with kmp and it is working on android and ios. Now i'm trying to port the same code to linux, but I'm not finding much material about, anyone knows an open source project using kmp on linux apps?