Compiler Server Fails on 32-bit Linux (Mono)

[steveisok]

Version Used: 3.3.0-beta2-19381-14 (ef3a7a3)

Steps to Reproduce:

Note - this fails because of the following code that assumes GlobalMemoryStatusEx is available. It's not on mono.

roslyn/src/Compilers/Server/VBCSCompiler/MemoryHelper.cs

Lines 32 to 54 in fab7134

	public static bool IsMemoryAvailable()
	{
	MemoryHelper status = new MemoryHelper();
	GlobalMemoryStatusEx(status);
	ulong max = status.MaxVirtual;
	ulong free = status.AvailableVirtual;
	int shift = 20;
	string unit = "MB";
	if (free >> shift == 0)
	{
	shift = 10;
	unit = "KB";
	}
	CompilerServerLogger.Log("Free memory: {1}{0} of {2}{0}.", unit, free >> shift, max >> shift);
	return free >= 800 << 20; // Value (500MB) is arbitrary; feel free to improve.
	}
	[DllImport("kernel32.dll", SetLastError = true)]
	private static extern bool GlobalMemoryStatusEx([In, Out] MemoryHelper buffer);
	}

1. Get your favorite 32-bit OS
2. Clone mono master (http://github.com/mono/mono)
3. Build it

Expected Behavior:
The named pipe connection to the compiler server should work. The logs in /mcs/build/compiler-server.log should indicate normal activity.

Actual Behavior:
Each call to the compiler server fails and falls back to local CSC. Normal build times take at least 2x as long.

Here's the exception in the logs:

--- PID=55254 TID=1 Ticks=50369644: Exception 'GlobalMemoryStatusEx assembly:<unknown assembly> type:<unknown type> member:(null)' occurred during 'Error creating client named pipe'. Stack trace:
  at (wrapper managed-to-native) Microsoft.CodeAnalysis.CompilerServer.MemoryHelper.GlobalMemoryStatusEx(Microsoft.CodeAnalysis.CompilerServer.MemoryHelper)
  at Microsoft.CodeAnalysis.CompilerServer.MemoryHelper.IsMemoryAvailable () [0x00005] in <b4db9195626c4d599771f618990c13f2>:0 
  at Microsoft.CodeAnalysis.CompilerServer.NamedPipeClientConnectionHost.CreateListenTaskCore (System.Threading.CancellationToken cancellationToken) [0x000e2] in <b4db9195626c4d599771f618990c13f2>:0 
  at Microsoft.CodeAnalysis.CompilerServer.NamedPipeClientConnectionHost.CreateListenTask (System.Threading.CancellationToken cancellationToken) [0x00075] in <b4db9195626c4d599771f618990c13f2>:0 
  at Microsoft.CodeAnalysis.CompilerServer.ServerDispatcher.HandleClientConnection (System.Threading.Tasks.Task`1[TResult] clientConnectionTask, System.Boolean allowCompilationRequests, System.Threading.CancellationToken cancellationToken) [0x00073] in <b4db9195626c4d599771f618990c13f2>:0