dotNET 7 core crashes with GC heap initialization

[zavocc]

Problem description
DotNET 7 SDK installed on Ubuntu 22.04 arm64 but most commands such as dotnet new dotnet --help shows GC heap initialization error without doing anything, just crashes

root@localhost:~# dotnet new console
GC heap initialization failed with error 0x8007000E
Failed to create CoreCLR, HRESULT: 0x8007000E
root@localhost:~# dotnet --help
GC heap initialization failed with error 0x8007000E
Failed to create CoreCLR, HRESULT: 0x8007000E
root@localhost:~# dotnet --info
GC heap initialization failed with error 0x8007000E
Failed to create CoreCLR, HRESULT: 0x8007000E

Host:
  Version:      7.0.10
  Architecture: arm64
  Commit:       a6dbb800a4

.NET SDKs installed:
  7.0.110 [/usr/lib/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 7.0.10 [/usr/lib/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 7.0.10 [/usr/lib/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download
root@localhost:~#

Steps to reproduce
This happens on Ubuntu 22.04 arm64 proot installation

1. Install proot-distro and Ubuntu proot-distro install ubuntu
2. Update packages and install dotNET SDK apt install dotnet-sdk-7.0
3. Run some dotNET commands such as dotnet --help dotnet new console dotnet run dotnet store yields GC initialization failure (some still does it's job like dotnet --info but with error about gc init failure)

Expected behavior
It should not crash with GC initialization failure

Additional information

Termux Variables:
TERMUX_API_VERSION=0.50.1
TERMUX_APK_RELEASE=F_DROID
TERMUX_APP_PACKAGE_MANAGER=apt
TERMUX_APP_PID=19765
TERMUX_IS_DEBUGGABLE_BUILD=0
TERMUX_MAIN_PACKAGE_FORMAT=debian
TERMUX_VERSION=0.118.0
Packages CPU architecture:
aarch64
Subscribed repositories:
# sources.list
deb https://packages-cf.termux.dev/apt/termux-main/ stable main
# x11-repo (sources.list.d/x11.list)
deb https://packages-cf.termux.dev/apt/termux-x11/ x11 main
Updatable packages:
command-not-found/stable 2.2.0-13 aarch64 [upgradable from: 2.2.0-12]
vulkan-headers/stable 1.3.261 all [upgradable from: 1.3.260]
vulkan-loader-generic/stable 1.3.261 aarch64 [upgradable from: 1.3.259]
zlib/stable 1.3 aarch64 [upgradable from: 1.2.13]
termux-tools version:
1.38.5
Android version:
11
Kernel build information:
Linux localhost 4.14.180-perf+ #2 SMP PREEMPT Sat Sep 3 23:17:03 CST 2022 aarch64 Android
Device manufacturer:
OPPO
Device model:
CPH1933
LD Variables:
LD_LIBRARY_PATH=
LD_PRELOAD=/data/data/com.termux/files/usr/lib/libtermux-exec.so
Installed termux plugins:
com.termux.api versionCode:51
com.termux.x11 versionCode:14

Not sure for older versions of dotnet if it exhibits the same behavior

[zavocc]

Tried dotNET 6 and it works when creating new project and other command line options (./dotnet6/dotnet new console -n HelloWorldApp) however building a sample app stumbled upon csc.dll error.

root@localhost:~# ./dotnet6/dotnet build HelloWorldAPP
MSBuild version 17.3.2+561848881 for .NET
  Determining projects to restore...
  All projects are up-to-date for restore.
/root/dotnet6/sdk/6.0.413/Roslyn/Microsoft.CSharp.Core.targets(75,5): error MSB6006: "csc.dll" exited with code 139. [/root/HelloWorldAPP/HelloWorldAPP.csproj]

Build FAILED.

/root/dotnet6/sdk/6.0.413/Roslyn/Microsoft.CSharp.Core.targets(75,5): error MSB6006: "csc.dll" exited with code 139. [/root/HelloWorldAPP/HelloWorldAPP.csproj]
    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:30.05

Might be related to this?
dotnet/runtime#57558

[michalbednarski]

strace shows:

mmap(NULL, 274877915136, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1 ENOMEM (Cannot allocate memory)

(On Pixel 6, on Raspberry Pi 4 same call has succeeded)

Googling "274877915136 bytes" number leads to dotnet/runtime#85556
where export DOTNET_GCHeapHardLimit=1C0000000 is offered as workaround

[zavocc]

Setting that environment variable makes dotNET 7 works like a charm