tools/offsets-tool/MonoAotOffsetsDumper.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.IO;
   4 using System.Linq;
   5 using System.Text.RegularExpressions;
   6 using CppSharp.AST;
   7 using CppSharp.AST.Extensions;
   8 using CppSharp.Parser;
   9
  10 namespace CppSharp
  11 {
  12     /**
  13      * This tool dumps the offsets of structures used in the Mono VM needed
  14      * by the AOT compiler for cross-compiling code to target platforms
  15      * different than the host the compiler is being invoked on.
  16      *
  17      * It takes two arguments: the path to your clone of the Mono repo and
  18      * the path to the root of Android NDK.
  19      */
  20     static class MonoAotOffsetsDumper
  21     {
  22         static string MonoDir = @"";
  23
  24         static List<string> Abis = new List<string> ();
  25         static string OutputDir;
  26
  27         static string MonodroidDir = @"";
  28         static string AndroidNdkPath = @"";
  29         static string MaccoreDir = @"";
  30         static string TargetDir = @"";
  31
  32         public enum TargetPlatform
  33         {
  34             Android,
  35             iOS,
  36             WatchOS,
  37         }
  38
  39         public class Target
  40         {
  41             public Target()
  42             {
  43                 Defines = new List<string>();
  44                 Arguments = new List<string>();
  45             }
  46
  47             public Target(Target target)
  48             {
  49                 Platform = target.Platform;
  50                 Triple = target.Triple;
  51                 Build = target.Build;
  52                 Defines = target.Defines;
  53                 Arguments = target.Arguments;
  54             }
  55
  56             public TargetPlatform Platform;
  57             public string Triple;
  58             public string Build;
  59             public List<string> Defines;
  60             public List<string> Arguments;
  61         };
  62
  63         public static List<Target> Targets = new List<Target>();
  64
  65         public static IEnumerable<Target> AndroidTargets
  66         {
  67             get { return Targets.Where ((t) => t.Platform == TargetPlatform.Android); }
  68         }
  69
  70         public static IEnumerable<Target> DarwinTargets
  71         {
  72             get
  73             {
  74                 return Targets.Where ((t) => t.Platform == TargetPlatform.iOS ||
  75                     t.Platform == TargetPlatform.WatchOS);
  76             }
  77         }
  78
  79         public static IEnumerable<Target> iOSTargets
  80         {
  81             get
  82             {
  83                 return Targets.Where ((t) => t.Platform == TargetPlatform.iOS);
  84             }
  85         }
  86
  87         public static void SetupAndroidTargets()
  88         {
  89             Targets.Add (new Target {
  90                 Platform = TargetPlatform.Android,
  91                 Triple = "i686-none-linux-android",
  92                 Defines = { "TARGET_X86" }
  93             });
  94
  95             Targets.Add (new Target {
  96                 Platform = TargetPlatform.Android,
  97                 Triple = "x86_64-none-linux-android",
  98                 Defines = { "TARGET_AMD64" }
  99             });
 100
 101             Targets.Add (new Target {
 102                 Platform = TargetPlatform.Android,
 103                 Triple = "armv5-none-linux-androideabi",
 104                 Defines = { "TARGET_ARM", "ARM_FPU_VFP", "HAVE_ARMV5" }
 105             });
 106
 107             Targets.Add (new Target {
 108                 Platform = TargetPlatform.Android,
 109                 Triple = "armv7-none-linux-androideabi",
 110                 Defines = { "TARGET_ARM", "ARM_FPU_VFP", "HAVE_ARMV5", "HAVE_ARMV6",
 111                     "HAVE_ARMV7"
 112                 }
 113             });
 114
 115             Targets.Add (new Target {
 116                 Platform = TargetPlatform.Android,
 117                 Triple = "aarch64-v8a-linux-android",
 118                 Defines = { "TARGET_ARM64" }
 119             });
 120
 121             /*Targets.Add(new Target {
 122                     Platform = TargetPlatform.Android,
 123                     Triple = "mipsel-none-linux-android",
 124                     Defines = { "TARGET_MIPS", "__mips__" }
 125                 });*/
 126
 127             foreach (var target in AndroidTargets)
 128                 target.Defines.AddRange (new string[] { "PLATFORM_ANDROID",
 129                     "TARGET_ANDROID", "MONO_CROSS_COMPILE", "USE_MONO_CTX"
 130                 });
 131         }
 132
 133         public static void SetupiOSTargets()
 134         {
 135             Targets.Add(new Target {
 136                 Platform = TargetPlatform.iOS,
 137                 Triple = "arm-apple-darwin10",
 138                 Build = "target7",
 139                 Defines = { "TARGET_ARM", "ARM_FPU_VFP", "HAVE_ARMV5" }
 140             });
 141
 142             Targets.Add(new Target {
 143                 Platform = TargetPlatform.iOS,
 144                 Triple = "aarch64-apple-darwin10",
 145                 Build = "target64",
 146                 Defines = { "TARGET_ARM64" }
 147             });
 148
 149             foreach (var target in iOSTargets) {
 150                 target.Defines.AddRange (new string[] { "PLATFORM_DARWIN",
 151                     "TARGET_IOS", "TARGET_MACH", "MONO_CROSS_COMPILE", "USE_MONO_CTX",
 152                     "_XOPEN_SOURCE"
 153                 });
 154             }
 155
 156             Targets.Add(new Target {
 157                 Platform = TargetPlatform.WatchOS,
 158                 Triple = "armv7k-apple-darwin",
 159                 Build = "targetwatch",
 160                 Defines = { "TARGET_ARM", "ARM_FPU_VFP", "HAVE_ARMV5" }
 161             });
 162
 163             foreach (var target in DarwinTargets) {
 164                 target.Defines.AddRange (new string[] { "PLATFORM_DARWIN",
 165                     "TARGET_IOS", "TARGET_MACH", "MONO_CROSS_COMPILE", "USE_MONO_CTX",
 166                     "_XOPEN_SOURCE"
 167                 });
 168             }
 169         }
 170
 171         static bool GetParentSubDirectoryPath(string parent, out string subdir)
 172         {
 173             var directory = Directory.GetParent(Directory.GetCurrentDirectory());
 174
 175             while (directory != null) {
 176                 var path = Path.Combine(directory.FullName, parent);
 177
 178                 if (Directory.Exists (path)) {
 179                     subdir = path;
 180                     return true;
 181                 }
 182
 183                 directory = directory.Parent;
 184             }
 185
 186             subdir = null;
 187             return false;
 188         }
 189
 190         public static void Main(string[] args)
 191         {
 192             ParseCommandLineArgs(args);
 193
 194             string monodroidDir;
 195             if (!Directory.Exists (MonodroidDir) &&
 196                 GetParentSubDirectoryPath ("monodroid", out monodroidDir)) {
 197                 MonodroidDir = Path.Combine (monodroidDir);
 198             }
 199
 200             if (Directory.Exists (MonodroidDir))
 201                 SetupAndroidTargets();
 202
 203             string maccoreDir;
 204             if (!Directory.Exists (MaccoreDir) &&
 205                 GetParentSubDirectoryPath ("maccore", out maccoreDir)) {
 206                 MaccoreDir = Path.Combine (maccoreDir);
 207             }
 208
 209             if (Directory.Exists(MaccoreDir))
 210                 SetupiOSTargets();
 211
 212             foreach (var target in Targets)
 213              {
 214                 if (Abis.Any() && !Abis.Any (target.Triple.Contains))
 215                     continue;
 216
 217                 Console.WriteLine();
 218                 Console.WriteLine("Processing triple: {0}", target.Triple);
 219
 220                 var options = new DriverOptions();
 221
 222                 var log = new TextDiagnosticPrinter();
 223                 var driver = new Driver(options, log);
 224
 225                 Setup(driver, target);
 226                 driver.Setup();
 227
 228                 BuildParseOptions(driver, target);
 229                 if (!driver.ParseCode())
 230                     return;
 231
 232                 Dump(driver.Context.ASTContext, driver.Context.TargetInfo, target);
 233             }
 234         }
 235
 236         static void BuildParseOptions(Driver driver, Target target)
 237         {
 238             foreach (var header in driver.Options.Headers)
 239             {
 240                 var source = driver.Project.AddFile(header);
 241                 source.Options = driver.BuildParserOptions(source);
 242
 243                 if (header.Contains ("mini"))
 244                     continue;
 245
 246                 source.Options.AddDefines ("HAVE_SGEN_GC");
 247                 source.Options.AddDefines ("HAVE_MOVING_COLLECTOR");
 248             }
 249         }
 250
 251         static string GetAndroidNdkPath()
 252         {
 253             if (!String.IsNullOrEmpty (AndroidNdkPath))
 254                 return AndroidNdkPath;
 255
 256             // Find the Android NDK's path from Monodroid's config.
 257             var configFile = Path.Combine(MonodroidDir, "env.config");
 258             if (!File.Exists(configFile))
 259                 throw new Exception("Expected a valid Monodroid environment config file at " + configFile);
 260
 261             var config = File.ReadAllText(configFile);
 262             var match = Regex.Match(config, @"ANDROID_NDK_PATH\s*:=\s(.*)");
 263             return match.Groups[1].Value.Trim();
 264         }
 265
 266         static void ParseCommandLineArgs(string[] args)
 267         {
 268             var showHelp = false;
 269
 270             var options = new Mono.Options.OptionSet () {
 271                 { "abi=", "ABI triple to generate", v => Abis.Add(v) },
 272                 { "o|out=", "output directory", v => OutputDir = v },
 273                 { "maccore=", "include directory", v => MaccoreDir = v },
 274                 { "monodroid=", "top monodroid directory", v => MonodroidDir = v },
 275                 { "android-ndk=", "Path to Android NDK", v => AndroidNdkPath = v },
 276                 { "targetdir=", "Path to the directory containing the mono build", v =>TargetDir = v },
 277                 { "mono=", "include directory", v => MonoDir = v },
 278                 { "h|help",  "show this message and exit",  v => showHelp = v != null },
 279             };
 280
 281             try {
 282                 options.Parse (args);
 283             }
 284             catch (Mono.Options.OptionException e) {
 285                 Console.WriteLine (e.Message);
 286                 Environment.Exit(0);
 287             }
 288
 289             if (showHelp)
 290             {
 291                 // Print usage and exit.
 292                 Console.WriteLine("{0} <options>",
 293                     AppDomain.CurrentDomain.FriendlyName);
 294                 options.WriteOptionDescriptions (Console.Out);
 295                 Environment.Exit(0);
 296             }
 297         }
 298
 299         static void Setup(Driver driver, Target target)
 300         {
 301             var options = driver.Options;
 302             options.DryRun = true;
 303             options.LibraryName = "Mono";
 304
 305             var parserOptions = driver.ParserOptions;
 306             parserOptions.Verbose = false;
 307             parserOptions.MicrosoftMode = false;
 308             parserOptions.AddArguments("-xc");
 309             parserOptions.AddArguments("-std=gnu99");
 310             parserOptions.AddDefines("CPPSHARP");
 311
 312             foreach (var define in target.Defines)
 313                 parserOptions.AddDefines(define);
 314
 315             SetupToolchainPaths(driver, target);
 316
 317             SetupMono(driver, target);
 318         }
 319
 320         static void SetupMono(Driver driver, Target target)
 321         {
 322             string targetBuild;
 323             switch (target.Platform) {
 324             case TargetPlatform.Android:
 325                 if (TargetDir == "") {
 326                     Console.Error.WriteLine ("The --targetdir= option is required when targeting android.");
 327                     Environment.Exit (1);
 328                 }
 329                 if (MonoDir == "") {
 330                     Console.Error.WriteLine ("The --mono= option is required when targeting android.");
 331                     Environment.Exit (1);
 332                 }
 333                 if (Abis.Count != 1) {
 334                     Console.Error.WriteLine ("Exactly one --abi= argument is required when targeting android.");
 335                     Environment.Exit (1);
 336                 }
 337                 targetBuild = TargetDir;
 338                 break;
 339             case TargetPlatform.WatchOS:
 340             case TargetPlatform.iOS: {
 341                 string targetPath = Path.Combine (MaccoreDir, "builds");
 342                 if (!Directory.Exists (MonoDir))
 343                     MonoDir = Path.GetFullPath (Path.Combine (targetPath, "../../mono"));
 344                 targetBuild = Path.Combine(targetPath, target.Build);
 345                 break;
 346             }
 347             default:
 348                 throw new ArgumentOutOfRangeException ();
 349             }
 350
 351             if (!Directory.Exists(targetBuild))
 352                 throw new Exception(string.Format("Could not find the target build directory: {0}", targetBuild));
 353
 354             var includeDirs = new[]
 355             {
 356                 targetBuild,
 357                 Path.Combine(targetBuild, "eglib", "src"),
 358                 MonoDir,
 359                 Path.Combine(MonoDir, "mono"),
 360                 Path.Combine(MonoDir, "mono", "mini"),
 361                 Path.Combine(MonoDir, "eglib", "src")
 362             };
 363
 364             foreach (var inc in includeDirs)
 365                 driver.ParserOptions.AddIncludeDirs(inc);
 366
 367             var filesToParse = new[]
 368             {
 369                 Path.Combine(MonoDir, "mono", "metadata", "metadata-cross-helpers.c"),
 370                 Path.Combine(MonoDir, "mono", "mini", "mini-cross-helpers.c"),
 371             };
 372
 373             foreach (var file in filesToParse)
 374                 driver.Options.Headers.Add(file);
 375         }
 376
 377         static void SetupMSVC(Driver driver, string triple)
 378         {
 379             var parserOptions = driver.ParserOptions;
 380
 381             parserOptions.Abi = Parser.AST.CppAbi.Microsoft;
 382             parserOptions.MicrosoftMode = true;
 383
 384             var systemIncludeDirs = new[]
 385             {
 386                 @"C:\Program Files (x86)\Windows Kits\8.1\Include\um",
 387                 @"C:\Program Files (x86)\Windows Kits\8.1\Include\shared"
 388             };
 389
 390             foreach (var inc in systemIncludeDirs)
 391                 parserOptions.AddSystemIncludeDirs(inc);
 392
 393             parserOptions.AddDefines("HOST_WIN32");
 394         }
 395
 396         static void SetupToolchainPaths(Driver driver, Target target)
 397         {
 398             switch (target.Platform) {
 399             case TargetPlatform.Android:
 400                 SetupAndroidNDK(driver, target);
 401                 break;
 402             case TargetPlatform.iOS:
 403             case TargetPlatform.WatchOS:
 404                 SetupXcode(driver, target);
 405                 break;
 406             default:
 407                 throw new ArgumentOutOfRangeException ();
 408             }
 409         }
 410
 411         static string GetArchFromTriple(string triple)
 412         {
 413             if (triple.Contains("mips"))
 414                 return "mips";
 415
 416             if (triple.Contains("arm64") || triple.Contains("aarch64"))
 417                 return "arm64";
 418
 419             if (triple.Contains("arm"))
 420                 return "arm";
 421
 422             if (triple.Contains("i686"))
 423                 return "x86";
 424
 425             if (triple.Contains("x86_64"))
 426                 return "x86_64";
 427
 428             throw  new Exception("Unknown architecture from triple: " + triple);
 429         }
 430
 431         static string GetXcodeToolchainPath()
 432         {
 433             var toolchains = Directory.EnumerateDirectories("/Applications", "Xcode*")
 434                 .ToList();
 435             toolchains.Sort();
 436
 437             var toolchainPath = toolchains.LastOrDefault();
 438             if (toolchainPath == null)
 439                 throw new Exception("Could not find a valid Xcode SDK");
 440
 441             return toolchainPath;
 442         }
 443
 444         static string GetXcodeBuiltinIncludesFolder()
 445         {
 446             var toolchainPath = GetXcodeToolchainPath();
 447
 448             var toolchains = Directory.EnumerateDirectories(Path.Combine(toolchainPath,
 449                 "Contents/Developer/Toolchains")).ToList();
 450             toolchains.Sort();
 451
 452             toolchainPath = toolchains.LastOrDefault();
 453             if (toolchainPath == null)
 454                 throw new Exception("Could not find a valid Xcode toolchain");
 455
 456             var includePaths = Directory.EnumerateDirectories(Path.Combine(toolchainPath,
 457                 "usr/lib/clang")).ToList();
 458             var includePath = includePaths.LastOrDefault();
 459
 460             if (includePath == null)
 461                 throw new Exception("Could not find a valid Clang include folder");
 462
 463             return Path.Combine(includePath, "include");
 464         }
 465
 466         static string GetXcodeiOSIncludesFolder()
 467         {
 468             var toolchainPath = GetXcodeToolchainPath();
 469
 470             var sdkPaths = Directory.EnumerateDirectories(Path.Combine(toolchainPath,
 471                 "Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs")).ToList();
 472             var sdkPath = sdkPaths.LastOrDefault();
 473
 474             if (sdkPath == null)
 475                 throw new Exception("Could not find a valid iPhone SDK");
 476
 477             return Path.Combine(sdkPath, "usr/include");
 478         }
 479
 480         static string GetXcodeWatchOSIncludesFolder()
 481         {
 482             var toolchainPath = GetXcodeToolchainPath();
 483
 484             var sdkPaths = Directory.EnumerateDirectories(Path.Combine(toolchainPath,
 485                 "Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs")).ToList();
 486             var sdkPath = sdkPaths.LastOrDefault();
 487
 488             if (sdkPath == null)
 489                 throw new Exception("Could not find a valid WatchOS SDK");
 490
 491             return Path.Combine(sdkPath, "usr/include");
 492         }
 493
 494         static void SetupXcode(Driver driver, Target target)
 495         {
 496             var parserOptions = driver.ParserOptions;
 497
 498             var builtinsPath = GetXcodeBuiltinIncludesFolder();
 499             string includePath;
 500
 501             switch (target.Platform) {
 502             case TargetPlatform.iOS:
 503                 includePath = GetXcodeiOSIncludesFolder();
 504                 break;
 505             case TargetPlatform.WatchOS:
 506                 includePath = GetXcodeWatchOSIncludesFolder();
 507                 break;
 508             default:
 509                 throw new ArgumentOutOfRangeException ();
 510             }
 511
 512             parserOptions.AddSystemIncludeDirs(builtinsPath);
 513             parserOptions.AddSystemIncludeDirs(includePath);
 514
 515             parserOptions.NoBuiltinIncludes = true;
 516             parserOptions.NoStandardIncludes = true;
 517             parserOptions.TargetTriple = target.Triple;
 518         }
 519
 520         static string GetAndroidHostToolchainPath()
 521         {
 522             var androidNdkPath = GetAndroidNdkPath ();
 523             var toolchains = Directory.EnumerateDirectories(
 524                 Path.Combine(androidNdkPath, "toolchains"), "llvm*").ToList();
 525             toolchains.Sort();
 526
 527             var toolchainPath = toolchains.LastOrDefault();
 528             if (toolchainPath == null)
 529                 throw new Exception("Could not find a valid NDK host toolchain");
 530
 531             toolchains = Directory.EnumerateDirectories(Path.Combine(toolchainPath,
 532                 "prebuilt")).ToList();
 533             toolchains.Sort();
 534
 535             toolchainPath = toolchains.LastOrDefault();
 536             if (toolchainPath == null)
 537                 throw new Exception("Could not find a valid NDK host toolchain");
 538
 539             return toolchainPath;
 540         }
 541
 542         static string GetAndroidBuiltinIncludesFolder()
 543         {
 544             var toolchainPath = GetAndroidHostToolchainPath();
 545
 546             string clangToolchainPath = Path.Combine(toolchainPath, "lib64", "clang");
 547             if (!Directory.Exists (clangToolchainPath))
 548                 clangToolchainPath = Path.Combine(toolchainPath, "lib", "clang");
 549
 550             string includePath = null;
 551             if (Directory.Exists (clangToolchainPath)) {
 552                 var includePaths = Directory.EnumerateDirectories(clangToolchainPath).ToList();
 553                 includePath = includePaths.LastOrDefault();
 554             }
 555             if (includePath == null)
 556                 throw new Exception("Could not find a valid Clang include folder");
 557
 558             return Path.Combine(includePath, "include");
 559         }
 560
 561         static void SetupAndroidNDK(Driver driver, Target target)
 562         {
 563             var options = driver.Options;
 564             var parserOptions = driver.ParserOptions;
 565
 566             var builtinsPath = GetAndroidBuiltinIncludesFolder();
 567             parserOptions.AddSystemIncludeDirs(builtinsPath);
 568
 569             var androidNdkRoot = GetAndroidNdkPath ();
 570             const int androidNdkApiLevel = 21;
 571
 572             var toolchainPath = Path.Combine(androidNdkRoot, "platforms",
 573                 "android-" + androidNdkApiLevel, "arch-" + GetArchFromTriple(target.Triple),
 574                 "usr", "include");
 575             parserOptions.AddSystemIncludeDirs(toolchainPath);
 576
 577             parserOptions.NoBuiltinIncludes = true;
 578             parserOptions.NoStandardIncludes = true;
 579             parserOptions.TargetTriple = target.Triple;
 580         }
 581
 582         static uint GetTypeAlign(ParserTargetInfo target, ParserIntType type)
 583         {
 584             switch (type)
 585             {
 586                 case ParserIntType.SignedChar:
 587                 case ParserIntType.UnsignedChar:
 588                     return target.CharAlign;
 589                 case ParserIntType.SignedShort:
 590                 case ParserIntType.UnsignedShort:
 591                     return target.ShortAlign;
 592                 case ParserIntType.SignedInt:
 593                 case ParserIntType.UnsignedInt:
 594                     return target.IntAlign;
 595                 case ParserIntType.SignedLong:
 596                 case ParserIntType.UnsignedLong:
 597                     return target.LongAlign;
 598                 case ParserIntType.SignedLongLong:
 599                 case ParserIntType.UnsignedLongLong:
 600                     return target.LongLongAlign;
 601                 default:
 602                     throw new Exception("Type has no alignment");
 603             }
 604         }
 605
 606         static uint GetTypeSize(ParserTargetInfo target, ParserIntType type)
 607         {
 608             switch (type)
 609             {
 610                 case ParserIntType.SignedChar:
 611                 case ParserIntType.UnsignedChar:
 612                     return target.CharWidth;
 613                 case ParserIntType.SignedShort:
 614                 case ParserIntType.UnsignedShort:
 615                     return target.ShortWidth;
 616                 case ParserIntType.SignedInt:
 617                 case ParserIntType.UnsignedInt:
 618                     return target.IntWidth;
 619                 case ParserIntType.SignedLong:
 620                 case ParserIntType.UnsignedLong:
 621                     return target.LongWidth;
 622                 case ParserIntType.SignedLongLong:
 623                 case ParserIntType.UnsignedLongLong:
 624                     return target.LongLongWidth;
 625                 default:
 626                     throw new Exception("Type has no size");
 627             }
 628         }
 629
 630         static string GetTargetPlatformDefine(TargetPlatform target)
 631         {
 632             switch (target) {
 633             case TargetPlatform.Android:
 634                 return "TARGET_ANDROID";
 635             case TargetPlatform.iOS:
 636                 return "TARGET_IOS";
 637             case TargetPlatform.WatchOS:
 638                 return "TARGET_WATCHOS";
 639             default:
 640                 throw new ArgumentOutOfRangeException ();
 641             }
 642         }
 643
 644         static void Dump(ASTContext ctx, ParserTargetInfo targetInfo, Target target)
 645         {
 646             var targetFile = target.Triple;
 647
 648             if (!string.IsNullOrEmpty (OutputDir))
 649                 targetFile = Path.Combine (OutputDir, targetFile);
 650
 651             targetFile += ".h";
 652
 653             using (var writer = new StreamWriter(targetFile))
 654             //using (var writer = Console.Out)
 655             {
 656                 writer.WriteLine("#ifndef USED_CROSS_COMPILER_OFFSETS");
 657                 writer.WriteLine("#ifdef {0}", target.Defines[0]);
 658                 writer.WriteLine ("#ifdef {0}", GetTargetPlatformDefine (target.Platform));
 659                 writer.WriteLine("#ifndef HAVE_BOEHM_GC");
 660                 writer.WriteLine("#define HAS_CROSS_COMPILER_OFFSETS");
 661                 writer.WriteLine("#if defined (USE_CROSS_COMPILE_OFFSETS) || defined (MONO_CROSS_COMPILE)");
 662                 writer.WriteLine("#if !defined (DISABLE_METADATA_OFFSETS)");
 663                 writer.WriteLine("#define USED_CROSS_COMPILER_OFFSETS");
 664
 665                 DumpAligns(writer, targetInfo);
 666                 DumpSizes(writer, targetInfo);
 667                 DumpMetadataOffsets(writer, ctx, target);
 668
 669                 writer.WriteLine("#endif //disable metadata check");
 670
 671                 DumpJITOffsets(writer, ctx);
 672
 673                 writer.WriteLine("#endif //cross compiler checks");
 674                 writer.WriteLine("#endif //gc check");
 675                 writer.WriteLine("#endif //os check");
 676                 writer.WriteLine("#endif //arch check");
 677                 writer.WriteLine("#endif //USED_CROSS_COMPILER_OFFSETS check");
 678             }
 679
 680             Console.WriteLine("Generated offsets file: {0}", targetFile);
 681         }
 682
 683         static void DumpAligns(TextWriter writer, ParserTargetInfo target)
 684         {
 685             var aligns = new[]
 686             {
 687                 new { Name = "gint8", Align = target.CharAlign},
 688                 new { Name = "gint16", Align = target.ShortAlign},
 689                 new { Name = "gint32", Align = target.IntAlign},
 690                 new { Name = "gint64", Align = GetTypeAlign(target, target.Int64Type)},
 691                 new { Name = "float", Align = target.FloatAlign},
 692                 new { Name = "double", Align = target.DoubleAlign},
 693                 new { Name = "gpointer", Align = GetTypeAlign(target, target.IntPtrType)},
 694             };
 695
 696             // Write the alignment info for the basic types.
 697             foreach (var align in aligns)
 698                 writer.WriteLine("DECL_ALIGN2({0},{1})", align.Name, align.Align / 8);
 699         }
 700
 701         static void DumpSizes(TextWriter writer, ParserTargetInfo target)
 702         {
 703             var sizes = new[]
 704             {
 705                 new { Name = "gint8", Size = target.CharWidth},
 706                 new { Name = "gint16", Size = target.ShortWidth},
 707                 new { Name = "gint32", Size = target.IntWidth},
 708                 new { Name = "gint64", Size = GetTypeSize(target, target.Int64Type)},
 709                 new { Name = "float", Size = target.FloatWidth},
 710                 new { Name = "double", Size = target.DoubleWidth},
 711                 new { Name = "gpointer", Size = GetTypeSize(target, target.IntPtrType)},
 712             };
 713
 714             // Write the size info for the basic types.
 715             foreach (var size in sizes)
 716                 writer.WriteLine("DECL_SIZE2({0},{1})", size.Name, size.Size / 8);
 717         }
 718
 719         static Class GetClassFromTypedef(ITypedDecl typedef)
 720         {
 721             var type = typedef.Type.Desugar() as TagType;
 722             if (type == null)
 723                 return null;
 724
 725             var @class = type.Declaration as Class;
 726
 727             return @class.IsIncomplete ?
 728                 (@class.CompleteDeclaration as Class) : @class;
 729         }
 730
 731         static void DumpClasses(TextWriter writer, ASTContext ctx, IEnumerable<string> types,
 732             bool optional = false)
 733         {
 734             foreach (var @struct in types)
 735             {
 736                 var @class = ctx.FindCompleteClass(@struct);
 737                 if (@class == null)
 738                     @class = ctx.FindCompleteClass("_" + @struct);
 739
 740                 if (@class == null)
 741                 {
 742                     var typedef = ctx.FindTypedef(@struct).FirstOrDefault(
 743                         decl => !decl.IsIncomplete);
 744
 745                     if (typedef != null)
 746                         @class = GetClassFromTypedef(typedef);
 747                 }
 748
 749                 if (@class == null && optional)
 750                     continue;
 751
 752                 if (@class == null)
 753                     throw new Exception("Expected to find struct definition for " + @struct);
 754
 755                 DumpStruct(writer, @class);
 756             }
 757         }
 758
 759         static void DumpMetadataOffsets(TextWriter writer, ASTContext ctx, Target target)
 760         {
 761             var types = new List<string>
 762             {
 763                 "MonoObject",
 764                 "MonoObjectHandlePayload",
 765                 "MonoClass",
 766                 "MonoVTable",
 767                 "MonoDelegate",
 768                 "MonoInternalThread",
 769                 "MonoMulticastDelegate",
 770                 "MonoTransparentProxy",
 771                 "MonoRealProxy",
 772                 "MonoRemoteClass",
 773                 "MonoArray",
 774                 "MonoArrayBounds",
 775                 "MonoSafeHandle",
 776                 "MonoHandleRef",
 777                 "MonoComInteropProxy",
 778                 "MonoString",
 779                 "MonoException",
 780                 "MonoTypedRef",
 781                 "MonoThreadsSync",
 782                 "SgenThreadInfo",
 783                 "SgenClientThreadInfo"
 784             };
 785
 786             DumpClasses(writer, ctx, types);
 787         }
 788
 789         static void DumpJITOffsets(TextWriter writer, ASTContext ctx)
 790         {
 791             writer.WriteLine("#ifndef DISABLE_JIT_OFFSETS");
 792             writer.WriteLine("#define USED_CROSS_COMPILER_OFFSETS");
 793
 794             var types = new[]
 795             {
 796                 "MonoLMF",
 797                 "MonoMethodRuntimeGenericContext",
 798                 "MonoJitTlsData",
 799                 "MonoGSharedVtMethodRuntimeInfo",
 800                 "MonoContinuation",
 801                 "MonoContext",
 802                 "MonoDelegateTrampInfo",
 803             };
 804
 805             DumpClasses(writer, ctx, types);
 806
 807             var optionalTypes = new[]
 808             {
 809                 "GSharedVtCallInfo",
 810                 "SeqPointInfo",
 811                 "DynCallArgs",
 812                 "MonoLMFTramp",
 813             };
 814
 815             DumpClasses(writer, ctx, optionalTypes, optional: true);
 816
 817             writer.WriteLine("#endif //disable jit check");
 818         }
 819
 820         static void DumpStruct(TextWriter writer, Class @class)
 821         {
 822             var name = @class.Name;
 823             if (name.StartsWith ("_", StringComparison.Ordinal))
 824                 name = name.Substring (1);
 825
 826             foreach (var field in @class.Fields)
 827             {
 828                 if (field.IsBitField) continue;
 829
 830                 if (name == "SgenThreadInfo" && field.Name == "regs")
 831                     continue;
 832
 833                 var layout = @class.Layout.Fields.First(f => f.FieldPtr == field.OriginalPtr);
 834
 835                 writer.WriteLine("DECL_OFFSET2({0},{1},{2})", name, field.Name,
 836                     layout.Offset);
 837             }
 838         }
 839     }
 840 }