Improve Console for iOS and Android

src/libraries/System.Console/src/System/ConsolePal.Android.cs

@@ -4,20 +4,53 @@
 
 using System.IO;
 using System.Text;
+using System.Diagnostics;
 using System.Runtime.InteropServices;
 
 namespace System
 {
     internal sealed unsafe class LogcatStream : ConsoleStream
     {
+        private readonly StringBuilder _buffer = new StringBuilder();
+
         public LogcatStream() : base(FileAccess.Write) {}
 
         public override int Read(byte[] buffer, int offset, int count) => throw Error.GetReadNotSupported();
 
         public override unsafe void Write(byte[] buffer, int offset, int count)
         {
-            string log = ConsolePal.OutputEncoding.GetString(buffer, offset, count);
-            Interop.Logcat.AndroidLogPrint(Interop.Logcat.LogLevel.Info, "DOTNET", log);
+            ValidateWrite(buffer, offset, count);
+
+            Span<byte> bufferSpan = buffer.AsSpan(offset, count);
+
+            Debug.Assert(ConsolePal.OutputEncoding == Encoding.Unicode);
+            Debug.Assert(bufferSpan.Length % 2 == 0);
+
+            Span<char> charSpan = MemoryMarshal.Cast<byte, char>(bufferSpan);
+
+            lock (_buffer)
+            {
+                if (charSpan.Contains('\n'))
+                {
+                    string logLine;
+                    if (_buffer.Length > 0)
+                    {
+                        _buffer.Append(charSpan);
+                        logLine = _buffer.ToString();
+                        _buffer.Clear();
+                    }
+                    else
+                    {
+                        logLine = charSpan.ToString();
+                    }
+                    Interop.Logcat.AndroidLogPrint(Interop.Logcat.LogLevel.Info, "DOTNET", logLine);
+                }
+                else
+                {
+                    // accumulate results until "\n" is written
+                    _buffer.Append(charSpan);
+                }
+            }
         }
     }
 

src/libraries/System.Console/src/System/ConsolePal.iOS.cs

@@ -4,11 +4,15 @@
 
 using System.IO;
 using System.Text;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
 
 namespace System
 {
     internal sealed class NSLogStream : ConsoleStream
     {
+        private readonly StringBuilder _buffer = new StringBuilder();
+
         public NSLogStream() : base(FileAccess.Write) {}
 
         public override int Read(byte[] buffer, int offset, int count) => throw Error.GetReadNotSupported();
@@ -17,9 +21,41 @@ public override unsafe void Write(byte[] buffer, int offset, int count)
         {
             ValidateWrite(buffer, offset, count);
 
-            fixed (byte* ptr = buffer)
+            Span<byte> bufferSpan = buffer.AsSpan(offset, count);
+
+            Debug.Assert(ConsolePal.OutputEncoding == Encoding.Unicode);
+            Debug.Assert(bufferSpan.Length % 2 == 0);
+
+            Span<char> charSpan = MemoryMarshal.Cast<byte, char>(bufferSpan);
+
+            lock (_buffer)
             {
-                Interop.Sys.Log(ptr + offset, count);
+                if (charSpan.Contains('\n'))
+                {
+                    string logLine;
+                    if (_buffer.Length > 0)
+                    {
+                        _buffer.Append(charSpan);
+                        logLine = _buffer.ToString();
+                        _buffer.Clear();
+                        fixed (char* ptr = logLine)
+                        {
+                            Interop.Sys.Log((byte*)ptr, logLine.Length * 2);
+                        }
+                    }
+                    else
+                    {
+                        fixed (byte* ptr = buffer)
+                        {
+                            Interop.Sys.Log(ptr + offset, count);
+                        }
+                    }
+                }
+                else
+                {
+                    // accumulate results until "\n" is written
+                    _buffer.Append(charSpan);
+                }
             }
         }
     }
@@ -170,4 +206,4 @@ internal sealed class ControlCHandlerRegistrar
             internal void Unregister() => throw new PlatformNotSupportedException();
         }
     }
-}
+}

src/mono/netcore/sample/iOS/Makefile

@@ -7,15 +7,15 @@ all: runtimepack run
 
 TOOLS_DIR=../../../../../tools-local/tasks/mobile.tasks
 appbuilder:
-	$(DOTNET) build -c Release $(TOOLS_DIR)/AotCompilerTask/MonoAOTCompiler.csproj
-	$(DOTNET) build -c Release $(TOOLS_DIR)/AppleAppBuilder/AppleAppBuilder.csproj
+	$(DOTNET) build -c $(MONO_ARCH) $(TOOLS_DIR)/AotCompilerTask/MonoAOTCompiler.csproj
+	$(DOTNET) build -c $(MONO_ARCH) $(TOOLS_DIR)/AppleAppBuilder/AppleAppBuilder.csproj
 
 runtimepack:
 	../../../../.././build.sh Mono+Libs -os iOS -arch $(MONO_ARCH) -c $(MONO_CONFIG)
 
 run: clean appbuilder
 	$(DOTNET) publish -c $(MONO_CONFIG) /p:TargetArchitecture=$(MONO_ARCH) \
-	/p:UseLLVM=$(USE_LLVM) /p:UseAotForSimulator=true
+	/p:UseLLVM=$(USE_LLVM) /p:UseAotForSimulator=false
 
 clean:
 	rm -rf bin

src/mono/netcore/sample/iOS/Program.csproj

@@ -25,7 +25,7 @@
 
   <Import Project="/Users/egorbo/prj/runtime/tools-local/tasks/mobile.tasks/AotCompilerTask/MonoAOTCompiler.props" />
   <UsingTask TaskName="AppleAppBuilderTask"
-             AssemblyFile="$(ArtifactsBinDir)AppleAppBuilder\$(Configuration)\$(NetCoreAppCurrent)\AppleAppBuilder.dll" />
+             AssemblyFile="$(ArtifactsBinDir)AppleAppBuilder\$(Platform)\$(NetCoreAppCurrent)\AppleAppBuilder.dll" />
 
   <UsingTask TaskName="MonoAOTCompiler"
              AssemblyFile="$(ArtifactsBinDir)MonoAOTCompiler\$(Configuration)\$(NetCoreAppCurrent)\MonoAOTCompiler.dll" />