[mlaunch] Process mlaunch exited with 139

[ivanpovazan]

Description

Launching an app with the latest used mlaunch version 1.0.68 (included in xharness 8.0.0-prerelease.23456.2 - the version bump occurred in: #1072 ) fails with:

[12:00:16.5658560] Running /Users/ivan/.nuget/packages/microsoft.dotnet.xharness.cli/8.0.0-prerelease.23456.2/tools/net8.0/any/../../../runtimes/any/native/mlaunch/bin/mlaunch --sdkroot /Applications/Xcode_14.3.1.app --disable-memory-limits --devname XXXXXXXX-XXXXXXXXXXXXXXXX --launchdevbundleid net.dot.HelloiOS --wait-for-exit -v -v -v -v -v
[12:00:18.3727270] Process mlaunch exited with 139
[12:00:23.3800430] Killing process tree of 57852...
[12:00:23.4890430] Pids to kill: 57852

Repro

1. Check out dotnet/runtime main branch
2. Change dir to:

cd src/mono/sample/iOS

3. Build the runtime and the sample app, and run it on a device:

make all TARGET=ios MONO_ARCH=arm64

Expected

The sample apps runs on a device

Actual

The console logs:

info: Starting 'HelloiOS' on 'Ivan’s iPhone'
  fail: App run has failed. mlaunch exited with 139
  info: Uninstalling the application 'net.dot.HelloiOS' from 'Ivan’s iPhone'
  info: Application 'net.dot.HelloiOS' was uninstalled successfully
  XHarness exit code: 83 (APP_LAUNCH_FAILURE)

Further inspecting the device logs:

[12:00:16.5658560] Running /Users/ivan/.nuget/packages/microsoft.dotnet.xharness.cli/8.0.0-prerelease.23456.2/tools/net8.0/any/../../../runtimes/any/native/mlaunch/bin/mlaunch --sdkroot /Applications/Xcode_14.3.1.app --disable-memory-limits --devname XXXXXXXX-XXXXXXXXXXXXXXXX --launchdevbundleid net.dot.HelloiOS --wait-for-exit -v -v -v -v -v
[12:00:18.3727270] Process mlaunch exited with 139
[12:00:23.3800430] Killing process tree of 57852...
[12:00:23.4890430] Pids to kill: 57852

Workaround

1. Reverting to a previous version of xharness with:

diff --git a/.config/dotnet-tools.json b/.config/dotnet-tools.json
index 7df4df2dd16..aa262536ceb 100644
--- a/.config/dotnet-tools.json
+++ b/.config/dotnet-tools.json
@@ -15,7 +15,7 @@
       ]
     },
     "microsoft.dotnet.xharness.cli": {
-      "version": "8.0.0-prerelease.23456.2",
+      "version": "8.0.0-prerelease.23431.1",
       "commands": [
         "xharness"
       ]

2. Restoring the tool

 ../../../../dotnet.sh tool restore

3. Running the built app with:

../../../../dotnet.sh xharness apple run --app=/Users/ivan/repos/runtime-mono-iOS/src/mono/sample/iOS/bin/ios-arm64/Bundle/HelloiOS/Debug-iphoneos/HelloiOS.app --targets=ios-device --output-directory=/tmp/out

Executes correctly:

[12:25:09.0695730] Running /Users/ivan/.nuget/packages/microsoft.dotnet.xharness.cli/8.0.0-prerelease.23431.1/tools/net8.0/any/../../../runtimes/any/native/mlaunch/bin/mlaunch --sdkroot /Applications/Xcode_14.3.1.app --disable-memory-limits --devname XXXXXXXX-XXXXXXXXXXXXXXXX --launchdevbundleid net.dot.HelloiOS --wait-for-exit -v -v -v -v -v
[12:25:16.1442720] Process mlaunch exited with 0
[12:25:21.1523210] Killing process tree of 58391...
[12:25:21.2418570] Pids to kill: 58391

[ivanpovazan]

/cc: @premun @kotlarmilos

[premun]

This seems like a problem within mlaunch. @ivanpovazan is there a build where we can get the full logs?

EDIT: Or can you share the rest of the logs?

[rolfbjarne]

I can reproduce, it's a problem with mlaunch.

[rolfbjarne]

Fix in progress: https://github.com/xamarin/maccore/pull/2709