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GetAotArguments.cs
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GetAotArguments.cs
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#nullable enable
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Java.Interop.Tools.Diagnostics;
using Microsoft.Android.Build.Tasks;
using Microsoft.Build.Framework;
using Xamarin.Android.Tools;
namespace Xamarin.Android.Tasks
{
/// <summary>
/// The <Aot/> task subclasses this in "legacy" Xamarin.Android.
/// The <GetAotAssemblies/> task subclasses this in .NET 6+.
/// </summary>
public abstract class GetAotArguments : AsyncTask
{
[Required]
public string AndroidApiLevel { get; set; } = "";
[Required]
public string AndroidAotMode { get; set; } = "";
[Required]
public string AotOutputDirectory { get; set; } = "";
[Required]
public string AndroidBinUtilsDirectory { get; set; } = "";
[Required]
public string TargetName { get; set; } = "";
/// <summary>
/// Will be blank in .NET 6+
/// </summary>
public string ManifestFile { get; set; } = "";
/// <summary>
/// $(AndroidMinimumSupportedApiLevel) in .NET 6+
/// </summary>
public string MinimumSupportedApiLevel { get; set; } = "";
public string RuntimeIdentifier { get; set; } = "";
public string AndroidNdkDirectory { get; set; } = "";
public bool EnableLLVM { get; set; }
public bool StripLibraries { get; set; }
public string AndroidSequencePointsMode { get; set; } = "";
public ITaskItem [] Profiles { get; set; } = Array.Empty<ITaskItem> ();
[Required, Output]
public ITaskItem [] ResolvedAssemblies { get; set; } = Array.Empty<ITaskItem> ();
[Output]
public string? Triple { get; set; }
[Output]
public string? ToolPrefix { get; set; }
[Output]
public string? MsymPath { get; set; }
[Output]
public string? LdName { get; set; }
[Output]
public string? LdFlags { get; set; }
protected AotMode AotMode;
protected SequencePointsMode SequencePointsMode;
protected string SdkBinDirectory = "";
protected bool UseAndroidNdk => !string.IsNullOrWhiteSpace (AndroidNdkDirectory);
public static bool GetAndroidAotMode(string androidAotMode, out AotMode aotMode)
{
aotMode = AotMode.Normal;
switch ((androidAotMode ?? string.Empty).ToLowerInvariant().Trim())
{
case "":
case "none":
aotMode = AotMode.None;
return true;
case "normal":
aotMode = AotMode.Normal;
return true;
case "hybrid":
aotMode = AotMode.Hybrid;
return true;
case "full":
aotMode = AotMode.Full;
return true;
case "interpreter":
// We don't do anything here for this mode, this is just to set the flag for the XA
// runtime to initialize Mono in the interpreter "AOT" mode.
aotMode = AotMode.Interp;
return true;
}
return false;
}
public static bool TryGetSequencePointsMode (string value, out SequencePointsMode mode)
{
mode = SequencePointsMode.None;
switch ((value ?? string.Empty).ToLowerInvariant ().Trim ()) {
case "none":
mode = SequencePointsMode.None;
return true;
case "normal":
mode = SequencePointsMode.Normal;
return true;
case "offline":
mode = SequencePointsMode.Offline;
return true;
}
return false;
}
protected string GetToolPrefix (NdkTools ndk, AndroidTargetArch arch, out int level)
{
level = 0;
return UseAndroidNdk
? ndk.GetNdkToolPrefixForAOT (arch, level = GetNdkApiLevel (ndk, arch))
: Path.Combine (AndroidBinUtilsDirectory, $"{ndk.GetArchDirName (arch)}-");
}
int GetNdkApiLevel (NdkTools ndk, AndroidTargetArch arch)
{
AndroidAppManifest? manifest = null;
if (!string.IsNullOrEmpty (ManifestFile)) {
manifest = AndroidAppManifest.Load (ManifestFile, MonoAndroidHelper.SupportedVersions);
}
int level;
if (manifest?.MinSdkVersion != null) {
level = manifest.MinSdkVersion.Value;
} else if (int.TryParse (MinimumSupportedApiLevel, out level)) {
// level already set
} else if (int.TryParse (AndroidApiLevel, out level)) {
// level already set
} else {
// Probably not ideal!
level = MonoAndroidHelper.SupportedVersions.MaxStableVersion.ApiLevel;
}
// Some Android API levels do not exist on the NDK level. Workaround this my mapping them to the
// most appropriate API level that does exist.
if (level == 6 || level == 7) level = 5;
else if (level == 10) level = 9;
else if (level == 11) level = 12;
else if (level == 20) level = 19;
else if (level == 22) level = 21;
else if (level == 23) level = 21;
// API levels below level 21 do not provide support for 64-bit architectures.
if (ndk.IsNdk64BitArch (arch) && level < 21) {
level = 21;
}
// We perform a downwards API level lookup search since we might not have hardcoded the correct API
// mapping above and we do not want to crash needlessly.
for (; level >= 5; level--) {
try {
ndk.GetDirectoryPath (NdkToolchainDir.PlatformLib, arch, level);
break;
} catch (InvalidOperationException ex) {
// Path not found, continue searching...
continue;
}
}
return level;
}
protected (string aotCompiler, string outdir, string mtriple, AndroidTargetArch arch) GetAbiSettings (string abi)
{
switch (abi) {
case "armeabi-v7a":
return (
Path.Combine (SdkBinDirectory, "cross-arm"),
Path.Combine (AotOutputDirectory, "armeabi-v7a"),
"armv7-linux-gnueabi",
AndroidTargetArch.Arm
);
case "arm64":
case "arm64-v8a":
case "aarch64":
return (
Path.Combine (SdkBinDirectory, "cross-arm64"),
Path.Combine (AotOutputDirectory, "arm64-v8a"),
"aarch64-linux-android",
AndroidTargetArch.Arm64
);
case "x86":
return (
Path.Combine (SdkBinDirectory, "cross-x86"),
Path.Combine (AotOutputDirectory, "x86"),
"i686-linux-android",
AndroidTargetArch.X86
);
case "x86_64":
return (
Path.Combine (SdkBinDirectory, "cross-x86_64"),
Path.Combine (AotOutputDirectory, "x86_64"),
"x86_64-linux-android",
AndroidTargetArch.X86_64
);
// case "mips":
default:
throw new Exception ("Unsupported Android target architecture ABI: " + abi);
}
}
/// <summary>
/// Fills [Output] parameters to pass to the --aot switch
/// </summary>
protected void GetAotOptions (NdkTools ndk, AndroidTargetArch arch, int level, string outdir, string toolPrefix)
{
if (SequencePointsMode == SequencePointsMode.Offline)
MsymPath = outdir;
string ldName;
if (UseAndroidNdk) {
ldName = ndk.GetToolPath (NdkToolKind.Linker, arch, level);
if (!string.IsNullOrEmpty (ldName)) {
ldName = Path.GetFileName (ldName);
if (ldName.IndexOf ('-') >= 0) {
ldName = ldName.Substring (ldName.LastIndexOf ("-", StringComparison.Ordinal) + 1);
}
}
} else {
ldName = "ld";
}
string ldFlags = GetLdFlags (ndk, arch, level, toolPrefix);
if (!string.IsNullOrEmpty (ldName)) {
LdName = ldName;
}
if (!string.IsNullOrEmpty (ldFlags)) {
LdFlags = ldFlags;
}
}
string GetLdFlags (NdkTools ndk, AndroidTargetArch arch, int level, string toolPrefix)
{
var toolchainPath = toolPrefix.Substring (0, toolPrefix.LastIndexOf (Path.DirectorySeparatorChar));
var ldFlags = new StringBuilder ();
var libs = new List<string> ();
if (UseAndroidNdk && EnableLLVM) {
string androidLibPath = string.Empty;
try {
androidLibPath = ndk.GetDirectoryPath (NdkToolchainDir.PlatformLib, arch, level);
} catch (InvalidOperationException ex) {
Diagnostic.Error (5101, ex.Message);
}
string toolchainLibDir;
if (ndk.UsesClang) {
if (ndk.NoBinutils) {
toolchainLibDir = String.Empty;
} else {
toolchainLibDir = GetNdkToolchainLibraryDir (ndk, toolchainPath, arch);
}
} else
toolchainLibDir = GetNdkToolchainLibraryDir (ndk, toolchainPath);
if (ndk.UsesClang) {
if (!String.IsNullOrEmpty (toolchainLibDir)) {
libs.Add ($"-L{toolchainLibDir.TrimEnd ('\\')}");
}
libs.Add ($"-L{androidLibPath.TrimEnd ('\\')}");
if (arch == AndroidTargetArch.Arm) {
// Needed for -lunwind to work
string compilerLibDir = Path.Combine (toolchainPath, "..", "sysroot", "usr", "lib", ndk.GetArchDirName (arch));
libs.Add ($"-L{compilerLibDir.TrimEnd ('\\')}");
}
}
if (!String.IsNullOrEmpty (toolchainLibDir)) {
libs.Add (Path.Combine (toolchainLibDir, "libgcc.a"));
}
libs.Add (Path.Combine (androidLibPath, "libc.so"));
libs.Add (Path.Combine (androidLibPath, "libm.so"));
} else if (!UseAndroidNdk && EnableLLVM) {
string libstubsPath = MonoAndroidHelper.GetLibstubsArchDirectoryPath (AndroidBinUtilsDirectory, arch);
libs.Add (Path.Combine (libstubsPath, "libc.so"));
libs.Add (Path.Combine (libstubsPath, "libm.so"));
}
if (libs.Count > 0) {
ldFlags.Append ($"\\\"{string.Join ("\\\";\\\"", libs)}\\\"");
}
//
// This flag is needed for Mono AOT to work correctly with the LLVM 14 `lld` linker due to the following change:
//
// The AArch64 port now supports adrp+ldr and adrp+add optimizations. --no-relax can suppress the optimization.
//
// Without the flag, `lld` will modify AOT-generated code in a way that the Mono runtime doesn't support. Until
// the runtime issue is fixed, we need to pass this flag then.
//
if (!UseAndroidNdk) {
if (ldFlags.Length > 0) {
ldFlags.Append (' ');
}
ldFlags.Append ("--no-relax");
}
if (StripLibraries) {
if (ldFlags.Length > 0) {
ldFlags.Append (' ');
}
ldFlags.Append ("-s");
}
return ldFlags.ToString ();
}
static string GetNdkToolchainLibraryDir (NdkTools ndk, string binDir, string archDir = null)
{
var baseDir = Path.GetFullPath (Path.Combine (binDir, ".."));
string libDir = Path.Combine (baseDir, "lib", "gcc");
if (!String.IsNullOrEmpty (archDir))
libDir = Path.Combine (libDir, archDir);
var gccLibDir = Directory.EnumerateDirectories (libDir).ToList ();
gccLibDir.Sort ();
var libPath = gccLibDir.LastOrDefault ();
if (libPath == null) {
goto no_toolchain_error;
}
if (ndk.UsesClang)
return libPath;
gccLibDir = Directory.EnumerateDirectories (libPath).ToList ();
gccLibDir.Sort ();
libPath = gccLibDir.LastOrDefault ();
if (libPath == null) {
goto no_toolchain_error;
}
return libPath;
no_toolchain_error:
throw new Exception ("Could not find a valid NDK compiler toolchain library path");
}
static string GetNdkToolchainLibraryDir (NdkTools ndk, string binDir, AndroidTargetArch arch)
{
return GetNdkToolchainLibraryDir (ndk, binDir, ndk.GetArchDirName (arch));
}
}
}