[flutter_tool] Fuchsia AOT builds (#45187)

packages/flutter_tools/lib/src/artifacts.dart

@@ -61,7 +61,7 @@ enum Artifact {
 
   // Fuchsia artifacts from the engine prebuilts.
   fuchsiaKernelCompiler,
-  fuchsiaFlutterJitRunner,
+  fuchsiaFlutterRunner,
 }
 
 String _artifactToFileName(Artifact artifact, [ TargetPlatform platform, BuildMode mode ]) {
@@ -136,11 +136,10 @@ String _artifactToFileName(Artifact artifact, [ TargetPlatform platform, BuildMo
       return 'flutter_ddc_sdk.dill';
     case Artifact.fuchsiaKernelCompiler:
       return 'kernel_compiler.snapshot';
-    case Artifact.fuchsiaFlutterJitRunner:
-      if (mode == BuildMode.debug || mode == BuildMode.profile) {
-        return 'flutter_jit_runner-0.far';
-      }
-      return 'flutter_jit_product_runner-0.far';
+    case Artifact.fuchsiaFlutterRunner:
+      final String jitOrAot = mode.isJit ? '_jit' : '_aot';
+      final String productOrNo = mode.isRelease ? '_product' : '';
+      return 'flutter$jitOrAot${productOrNo}_runner-0.far';
   }
   assert(false, 'Invalid artifact $artifact.');
   return null;
@@ -278,21 +277,25 @@ class CachedArtifacts extends Artifacts {
       cache.getArtifactDirectory('flutter_runner').path,
       'flutter',
       fuchsiaArchForTargetPlatform(platform),
-      getNameForBuildMode(mode),
+      mode.isRelease ? 'release' : mode.toString(),
     );
+    final String runtime = mode.isJit ? 'jit' : 'aot';
     switch (artifact) {
+      case Artifact.genSnapshot:
+        final String genSnapshot = mode.isRelease ? 'gen_snapshot_product' : 'gen_snapshot';
+        return fs.path.join(root, runtime, 'dart_binaries', genSnapshot);
       case Artifact.flutterPatchedSdkPath:
         const String artifactFileName = 'flutter_runner_patched_sdk';
-        return fs.path.join(root, 'jit', artifactFileName);
+        return fs.path.join(root, runtime, artifactFileName);
       case Artifact.platformKernelDill:
         final String artifactFileName = _artifactToFileName(artifact, platform, mode);
-        return fs.path.join(root, 'jit', 'flutter_runner_patched_sdk', artifactFileName);
+        return fs.path.join(root, runtime, 'flutter_runner_patched_sdk', artifactFileName);
       case Artifact.fuchsiaKernelCompiler:
         final String artifactFileName = _artifactToFileName(artifact, platform, mode);
-        return fs.path.join(root, 'jit', 'dart_binaries', artifactFileName);
-      case Artifact.fuchsiaFlutterJitRunner:
+        return fs.path.join(root, runtime, 'dart_binaries', artifactFileName);
+      case Artifact.fuchsiaFlutterRunner:
         final String artifactFileName = _artifactToFileName(artifact, platform, mode);
-        return fs.path.join(root, 'jit', artifactFileName);
+        return fs.path.join(root, runtime, artifactFileName);
       default:
         return _getHostArtifactPath(artifact, platform, mode);
     }
@@ -413,7 +416,7 @@ class LocalEngineArtifacts extends Artifacts {
   @override
   String getArtifactPath(Artifact artifact, { TargetPlatform platform, BuildMode mode }) {
     platform ??= _currentHostPlatform;
-    final String artifactFileName = _artifactToFileName(artifact, platform);
+    final String artifactFileName = _artifactToFileName(artifact, platform, mode);
     switch (artifact) {
       case Artifact.snapshotDart:
         return fs.path.join(_engineSrcPath, 'flutter', 'lib', 'snapshot', artifactFileName);
@@ -482,13 +485,13 @@ class LocalEngineArtifacts extends Artifacts {
         return fs.path.join(_getFlutterWebSdkPath(), 'kernel', _artifactToFileName(artifact));
       case Artifact.fuchsiaKernelCompiler:
         final String hostPlatform = getNameForHostPlatform(getCurrentHostPlatform());
-        final String dartBinaries = 'dart_binaries-$mode-$hostPlatform';
+        final String modeName = mode.isRelease ? 'release' : mode.toString();
+        final String dartBinaries = 'dart_binaries-$modeName-$hostPlatform';
         return fs.path.join(engineOutPath, 'host_bundle', dartBinaries, 'kernel_compiler.dart.snapshot');
-      case Artifact.fuchsiaFlutterJitRunner:
-        if (mode == BuildMode.debug || mode == BuildMode.profile) {
-          return fs.path.join(engineOutPath, 'flutter_jit_runner-0.far');
-        }
-        return fs.path.join(engineOutPath, 'flutter_jit_product_runner-0.far');
+      case Artifact.fuchsiaFlutterRunner:
+        final String jitOrAot = mode.isJit ? '_jit' : '_aot';
+        final String productOrNo = mode.isRelease ? '_product' : '';
+        return fs.path.join(engineOutPath, 'flutter$jitOrAot${productOrNo}_runner-0.far');
     }
     assert(false, 'Invalid artifact $artifact.');
     return null;

packages/flutter_tools/lib/src/build_info.dart

@@ -59,6 +59,7 @@ class BuildInfo {
 
   static const BuildInfo debug = BuildInfo(BuildMode.debug, null);
   static const BuildInfo profile = BuildInfo(BuildMode.profile, null);
+  static const BuildInfo jitRelease = BuildInfo(BuildMode.jitRelease, null);
   static const BuildInfo release = BuildInfo(BuildMode.release, null);
 
   /// Returns whether a debug build is requested.
@@ -68,14 +69,22 @@ class BuildInfo {
 
   /// Returns whether a profile build is requested.
   ///
-  /// Exactly one of [isDebug], [isProfile], or [isRelease] is true.
+  /// Exactly one of [isDebug], [isProfile], [isJitRelease],
+  /// or [isRelease] is true.
   bool get isProfile => mode == BuildMode.profile;
 
   /// Returns whether a release build is requested.
   ///
-  /// Exactly one of [isDebug], [isProfile], or [isRelease] is true.
+  /// Exactly one of [isDebug], [isProfile], [isJitRelease],
+  /// or [isRelease] is true.
   bool get isRelease => mode == BuildMode.release;
 
+  /// Returns whether a JIT release build is requested.
+  ///
+  /// Exactly one of [isDebug], [isProfile], [isJitRelease],
+  /// or [isRelease] is true.
+  bool get isJitRelease => mode == BuildMode.jitRelease;
+
   bool get usesAot => isAotBuildMode(mode);
   bool get supportsEmulator => isEmulatorBuildMode(mode);
   bool get supportsSimulator => isEmulatorBuildMode(mode);

packages/flutter_tools/lib/src/commands/attach.dart

@@ -214,7 +214,7 @@ class AttachCommand extends FlutterCommand {
         if (module == null) {
           throwToolExit('\'--module\' is required for attaching to a Fuchsia device');
         }
-        usesIpv6 = device.ipv6;
+        usesIpv6 = await device.ipv6;
         FuchsiaIsolateDiscoveryProtocol isolateDiscoveryProtocol;
         try {
           isolateDiscoveryProtocol = device.getIsolateDiscoveryProtocol(module);

packages/flutter_tools/lib/src/commands/build_fuchsia.dart

@@ -31,6 +31,11 @@ class BuildFuchsiaCommand extends BuildSubCommand {
       ],
       defaultsTo: FuchsiaPackageServer.toolHost,
     );
+    argParser.addOption('target-platform',
+      defaultsTo: 'fuchsia-x64',
+      allowed: <String>['fuchsia-arm64', 'fuchsia-x64'],
+      help: 'The target platform for which the app is compiled.',
+    );
   }
 
   @override
@@ -69,6 +74,7 @@ class BuildFuchsiaCommand extends BuildSubCommand {
     await buildFuchsia(
       fuchsiaProject: flutterProject.fuchsia,
       target: targetFile,
+      targetPlatform: getTargetPlatformForName(argResults['target-platform']),
       buildInfo: buildInfo,
       runnerPackageSource: stringArg('runner-source'),
     );

packages/flutter_tools/lib/src/commands/build_ios.dart

@@ -19,24 +19,13 @@ import 'build.dart';
 /// .ipas, see https://flutter.dev/docs/deployment/ios.
 class BuildIOSCommand extends BuildSubCommand {
   BuildIOSCommand() {
+    addBuildModeFlags(defaultToRelease: false);
     usesTargetOption();
     usesFlavorOption();
     usesPubOption();
     usesBuildNumberOption();
     usesBuildNameOption();
     argParser
-      ..addFlag('debug',
-        negatable: false,
-        help: 'Build a debug version of your app (default mode for iOS simulator builds).',
-      )
-      ..addFlag('profile',
-        negatable: false,
-        help: 'Build a version of your app specialized for performance profiling.',
-      )
-      ..addFlag('release',
-        negatable: false,
-        help: 'Build a release version of your app (default mode for device builds).',
-      )
       ..addFlag('simulator',
         help: 'Build for the iOS simulator instead of the device.',
       )

packages/flutter_tools/lib/src/commands/build_linux.dart

@@ -17,19 +17,8 @@ import 'build.dart';
 /// A command to build a linux desktop target through a build shell script.
 class BuildLinuxCommand extends BuildSubCommand {
   BuildLinuxCommand() {
+    addBuildModeFlags(defaultToRelease: false);
     usesTargetOption();
-    argParser.addFlag('debug',
-      negatable: false,
-      help: 'Build a debug version of your app.',
-    );
-    argParser.addFlag('profile',
-      negatable: false,
-      help: 'Build a version of your app specialized for performance profiling.',
-    );
-    argParser.addFlag('release',
-      negatable: false,
-      help: 'Build a version of your app specialized for performance profiling.',
-    );
   }
 
   @override

packages/flutter_tools/lib/src/commands/build_windows.dart

@@ -17,19 +17,8 @@ import 'build.dart';
 /// A command to build a windows desktop target through a build shell script.
 class BuildWindowsCommand extends BuildSubCommand {
   BuildWindowsCommand() {
+    addBuildModeFlags(defaultToRelease: false);
     usesTargetOption();
-    argParser.addFlag('debug',
-      negatable: false,
-      help: 'Build a debug version of your app.',
-    );
-    argParser.addFlag('profile',
-      negatable: false,
-      help: 'Build a version of your app specialized for performance profiling.',
-    );
-    argParser.addFlag('release',
-      negatable: false,
-      help: 'Build a version of your app specialized for performance profiling.',
-    );
   }
 
   @override

packages/flutter_tools/lib/src/commands/run.dart

@@ -295,7 +295,7 @@ class RunCommand extends RunCommandBase {
 
   DebuggingOptions _createDebuggingOptions() {
     final BuildInfo buildInfo = getBuildInfo();
-    if (buildInfo.isRelease) {
+    if (buildInfo.mode.isRelease) {
       return DebuggingOptions.disabled(
         buildInfo,
         initializePlatform: boolArg('web-initialize-platform'),

packages/flutter_tools/lib/src/fuchsia/fuchsia_build.dart

@@ -6,10 +6,13 @@ import 'dart:async';
 
 import 'package:meta/meta.dart';
 
+import '../artifacts.dart';
 import '../asset.dart';
 import '../base/common.dart';
 import '../base/file_system.dart';
 import '../base/io.dart';
+import '../base/logger.dart';
+import '../base/process.dart';
 import '../base/utils.dart';
 import '../build_info.dart';
 import '../bundle.dart';
@@ -37,6 +40,7 @@ Future<void> _timedBuildStep(String name, Future<void> Function() action) async
 //    Fuchsia package.
 Future<void> buildFuchsia({
   @required FuchsiaProject fuchsiaProject,
+  @required TargetPlatform targetPlatform,
   @required String target, // E.g., lib/main.dart
   BuildInfo buildInfo = BuildInfo.debug,
   String runnerPackageSource = FuchsiaPackageServer.toolHost,
@@ -49,12 +53,66 @@ Future<void> buildFuchsia({
   await _timedBuildStep('fuchsia-kernel-compile',
     () => fuchsiaSdk.fuchsiaKernelCompiler.build(
       fuchsiaProject: fuchsiaProject, target: target, buildInfo: buildInfo));
+
+  if (buildInfo.usesAot) {
+    await _timedBuildStep('fuchsia-gen-snapshot',
+      () => _genSnapshot(fuchsiaProject, target, buildInfo, targetPlatform));
+  }
+
   await _timedBuildStep('fuchsia-build-assets',
     () => _buildAssets(fuchsiaProject, target, buildInfo));
   await _timedBuildStep('fuchsia-build-package',
     () => _buildPackage(fuchsiaProject, target, buildInfo, runnerPackageSource));
 }
 
+Future<void> _genSnapshot(
+  FuchsiaProject fuchsiaProject,
+  String target, // lib/main.dart
+  BuildInfo buildInfo,
+  TargetPlatform targetPlatform,
+) async {
+  final String outDir = getFuchsiaBuildDirectory();
+  final String appName = fuchsiaProject.project.manifest.appName;
+  final String dilPath = fs.path.join(outDir, '$appName.dil');
+
+  final String vmSnapshotData = fs.path.join(outDir, 'vm_data.aotsnapshot');
+  final String vmSnapshotInstructions = fs.path.join(outDir, 'vm_instructions.aotsnapshot');
+  final String snapshotData = fs.path.join(outDir, 'data.aotsnapshot');
+  final String snapshotInstructions = fs.path.join(outDir, 'instructions.aotsnapshot');
+
+  final String genSnapshot = artifacts.getArtifactPath(
+    Artifact.genSnapshot,
+    platform: targetPlatform,
+    mode: buildInfo.mode,
+  );
+
+  final List<String> command = <String>[
+    genSnapshot,
+    '--no_causal_async_stacks',
+    '--deterministic',
+    '--snapshot_kind=app-aot-blobs',
+    '--vm_snapshot_data=$vmSnapshotData',
+    '--vm_snapshot_instructions=$vmSnapshotInstructions',
+    '--isolate_snapshot_data=$snapshotData',
+    '--isolate_snapshot_instructions=$snapshotInstructions',
+    if (buildInfo.isDebug) '--enable-asserts',
+    dilPath,
+  ];
+  int result;
+  final Status status = logger.startProgress(
+    'Compiling Fuchsia application to native code...',
+    timeout: null,
+  );
+  try {
+    result = await processUtils.stream(command, trace: true);
+  } finally {
+    status.cancel();
+  }
+  if (result != 0) {
+    throwToolExit('Build process failed');
+  }
+}
+
 Future<void> _buildAssets(
   FuchsiaProject fuchsiaProject,
   String target, // lib/main.dart
@@ -98,12 +156,17 @@ void _rewriteCmx(BuildMode mode, String runnerPackageSource, File src, File dst)
   String runner;
   switch (mode) {
     case BuildMode.debug:
-    case BuildMode.profile:
       runner = 'flutter_jit_runner';
       break;
-    case BuildMode.release:
+    case BuildMode.profile:
+      runner = 'flutter_aot_runner';
+      break;
+    case BuildMode.jitRelease:
       runner = 'flutter_jit_product_runner';
       break;
+    case BuildMode.release:
+      runner = 'flutter_aot_product_runner';
+      break;
     default:
       throwToolExit('Fuchsia does not support build mode "$mode"');
       break;
@@ -122,7 +185,6 @@ Future<void> _buildPackage(
   final String outDir = getFuchsiaBuildDirectory();
   final String pkgDir = fs.path.join(outDir, 'pkg');
   final String appName = fuchsiaProject.project.manifest.appName;
-  final String dilpmanifest = fs.path.join(outDir, '$appName.dilpmanifest');
   final String pkgassets = fs.path.join(outDir, '${appName}_pkgassets');
   final String packageManifest = fs.path.join(pkgDir, 'package_manifest');
   final String devKeyPath = fs.path.join(pkgDir, 'development.key');
@@ -137,9 +199,29 @@ Future<void> _buildPackage(
   final File dstCmx = fs.file(fs.path.join(outDir, '$appName.cmx'));
   _rewriteCmx(buildInfo.mode, runnerPackageSource, srcCmx, dstCmx);
 
-  // Concatenate dilpmanifest and pkgassets into package_manifest.
   final File manifestFile = fs.file(packageManifest);
+
+  if (buildInfo.usesAot) {
+    final String vmSnapshotData = fs.path.join(outDir, 'vm_data.aotsnapshot');
+    final String vmSnapshotInstructions = fs.path.join(outDir, 'vm_instructions.aotsnapshot');
+    final String snapshotData = fs.path.join(outDir, 'data.aotsnapshot');
+    final String snapshotInstructions = fs.path.join(outDir, 'instructions.aotsnapshot');
+    manifestFile.writeAsStringSync(
+      'data/$appName/vm_snapshot_data.bin=$vmSnapshotData\n');
+    manifestFile.writeAsStringSync(
+      'data/$appName/vm_snapshot_instructions.bin=$vmSnapshotInstructions\n',
+      mode: FileMode.append);
+    manifestFile.writeAsStringSync(
+      'data/$appName/isolate_snapshot_data.bin=$snapshotData\n',
+      mode: FileMode.append);
+    manifestFile.writeAsStringSync(
+      'data/$appName/isolate_snapshot_instructions.bin=$snapshotInstructions\n',
+      mode: FileMode.append);
+  } else {
+    final String dilpmanifest = fs.path.join(outDir, '$appName.dilpmanifest');
     manifestFile.writeAsStringSync(fs.file(dilpmanifest).readAsStringSync());
+  }
+
   manifestFile.writeAsStringSync(fs.file(pkgassets).readAsStringSync(),
       mode: FileMode.append);
   manifestFile.writeAsStringSync('meta/$appName.cmx=${dstCmx.path}\n',

packages/flutter_tools/lib/src/fuchsia/fuchsia_dev_finder.dart

@@ -40,12 +40,14 @@ class FuchsiaDevFinder {
     return result.stdout.split('\n');
   }
 
-  /// Returns the host address by which the device [deviceName] should use for
-  /// the host.
+  /// Returns the address of the named device.
+  ///
+  /// If local is true, then gives the address by which the device reaches the
+  /// host.
   ///
   /// The string [deviceName] should be the name of the device from the
   /// 'list' command, e.g. 'scare-cable-skip-joy'.
-  Future<String> resolve(String deviceName) async {
+  Future<String> resolve(String deviceName, {bool local = false}) async {
     if (fuchsiaArtifacts.devFinder == null ||
         !fuchsiaArtifacts.devFinder.existsSync()) {
       throwToolExit('Fuchsia dev_finder tool not found.');
@@ -53,7 +55,7 @@ class FuchsiaDevFinder {
     final List<String> command = <String>[
       fuchsiaArtifacts.devFinder.path,
       'resolve',
-      '-local',
+      if (local) '-local',
       '-device-limit', '1',
       deviceName,
     ];

packages/flutter_tools/lib/src/fuchsia/fuchsia_device.dart

@@ -230,13 +230,17 @@ class FuchsiaDevice extends Device {
   }) async {
     if (!prebuiltApplication) {
       await buildFuchsia(fuchsiaProject: FlutterProject.current().fuchsia,
+                         targetPlatform: await targetPlatform,
                          target: mainPath,
                          buildInfo: debuggingOptions.buildInfo);
     }
     // Stop the app if it's currently running.
     await stopApp(package);
     // Find out who the device thinks we are.
-    final String host = await fuchsiaSdk.fuchsiaDevFinder.resolve(name);
+    final String host = await fuchsiaSdk.fuchsiaDevFinder.resolve(
+      name,
+      local: true,
+    );
     if (host == null) {
       printError('Failed to resolve host for Fuchsia device');
       return LaunchResult.failed();
@@ -301,7 +305,7 @@ class FuchsiaDevice extends Device {
 
       // Serve the flutter_runner.
       final File flutterRunnerArchive = fs.file(artifacts.getArtifactPath(
-        Artifact.fuchsiaFlutterJitRunner,
+        Artifact.fuchsiaFlutterRunner,
         platform: await targetPlatform,
         mode: debuggingOptions.buildInfo.mode,
       ));
@@ -318,10 +322,19 @@ class FuchsiaDevice extends Device {
       serverRegistered = true;
 
       // Tell the package controller to prefetch the flutter_runner.
-      String flutterRunnerName = 'flutter_jit_runner';
-      if (!debuggingOptions.buildInfo.isDebug &&
-          !debuggingOptions.buildInfo.isProfile) {
+      String flutterRunnerName;
+      if (debuggingOptions.buildInfo.usesAot) {
+        if (debuggingOptions.buildInfo.mode.isRelease) {
+          flutterRunnerName = 'flutter_aot_product_runner';
+        } else {
+          flutterRunnerName = 'flutter_aot_runner';
+        }
+      } else {
+        if (debuggingOptions.buildInfo.mode.isRelease) {
           flutterRunnerName = 'flutter_jit_product_runner';
+        } else {
+          flutterRunnerName = 'flutter_jit_runner';
+        }
       }
       if (!await fuchsiaDeviceTools.amberCtl.pkgCtlResolve(
           this, fuchsiaPackageServer, flutterRunnerName)) {
@@ -367,10 +380,11 @@ class FuchsiaDevice extends Device {
       status.cancel();
     }
 
-    if (!debuggingOptions.buildInfo.isDebug &&
-        !debuggingOptions.buildInfo.isProfile) {
+    if (debuggingOptions.buildInfo.mode.isRelease) {
+      printTrace('App succesfully started in a release mode.');
       return LaunchResult.succeeded();
     }
+    printTrace('App started in a non-release mode. Setting up vmservice connection.');
 
     // In a debug or profile build, try to find the observatory uri.
     final FuchsiaIsolateDiscoveryProtocol discovery =
@@ -452,9 +466,9 @@ class FuchsiaDevice extends Device {
   @override
   bool get supportsScreenshot => false;
 
-  bool get ipv6 {
+  Future<bool> get ipv6 async {
     // Workaround for https://github.com/dart-lang/sdk/issues/29456
-    final String fragment = id.split('%').first;
+    final String fragment = (await _resolvedIp).split('%').first;
     try {
       Uri.parseIPv6Address(fragment);
       return true;
@@ -468,7 +482,7 @@ class FuchsiaDevice extends Device {
     const String findCommand = 'find /hub -name vmservice-port';
     final RunResult findResult = await shell(findCommand);
     if (findResult.exitCode != 0) {
-      throwToolExit("'$findCommand' on device $id failed. stderr: '${findResult.stderr}'");
+      throwToolExit("'$findCommand' on device $name failed. stderr: '${findResult.stderr}'");
       return null;
     }
     final String findOutput = findResult.stdout;
@@ -485,7 +499,7 @@ class FuchsiaDevice extends Device {
       final String lsCommand = 'ls $path';
       final RunResult lsResult = await shell(lsCommand);
       if (lsResult.exitCode != 0) {
-        throwToolExit("'$lsCommand' on device $id failed");
+        throwToolExit("'$lsCommand' on device $name failed");
         return null;
       }
       final String lsOutput = lsResult.stdout;
@@ -502,6 +516,15 @@ class FuchsiaDevice extends Device {
     return ports;
   }
 
+  String _cachedResolvedIp;
+
+  Future<String> get _resolvedIp async {
+    return _cachedResolvedIp ??= await fuchsiaSdk.fuchsiaDevFinder.resolve(
+      name,
+      local: false,
+    );
+  }
+
   /// Run `command` on the Fuchsia device shell.
   Future<RunResult> shell(String command) async {
     if (fuchsiaArtifacts.sshConfig == null) {
@@ -512,7 +535,7 @@ class FuchsiaDevice extends Device {
       'ssh',
       '-F',
       fuchsiaArtifacts.sshConfig.absolute.path,
-      id,
+      await _resolvedIp,
       command,
     ]);
   }
@@ -633,7 +656,7 @@ class FuchsiaIsolateDiscoveryProtocol {
         }
         final Uri address = flutterView.owner.vmService.httpAddress;
         if (flutterView.uiIsolate.name.contains(_isolateName)) {
-          _foundUri.complete(_device.ipv6
+          _foundUri.complete(await _device.ipv6
               ? Uri.parse('http://[$_ipv6Loopback]:${address.port}/')
               : Uri.parse('http://$_ipv4Loopback:${address.port}/'));
           _status.stop();
@@ -674,7 +697,7 @@ class _FuchsiaPortForwarder extends DevicePortForwarder {
       '-f',
       '-L',
       '$hostPort:$_ipv4Loopback:$devicePort',
-      device.id,
+      await device._resolvedIp,
       'true',
     ];
     final Process process = await processManager.start(command);
@@ -706,7 +729,7 @@ class _FuchsiaPortForwarder extends DevicePortForwarder {
       '-vvv',
       '-L',
       '${forwardedPort.hostPort}:$_ipv4Loopback:${forwardedPort.devicePort}',
-      device.id,
+      await device._resolvedIp,
     ];
     final ProcessResult result = await processManager.run(command);
     if (result.exitCode != 0) {

packages/flutter_tools/lib/src/fuchsia/fuchsia_kernel_compiler.dart

@@ -7,11 +7,9 @@ import 'package:meta/meta.dart';
 import '../artifacts.dart';
 import '../base/common.dart';
 import '../base/file_system.dart';
-import '../base/io.dart';
 import '../base/logger.dart';
 import '../base/process.dart';
 import '../build_info.dart';
-import '../convert.dart';
 import '../globals.dart';
 import '../project.dart';
 
@@ -58,35 +56,31 @@ class FuchsiaKernelCompiler {
       '--filesystem-root', fsRoot,
       '--packages', '$multiRootScheme:///$relativePackagesFile',
       '--output', fs.path.join(outDir, '$appName.dil'),
+      '--component-name', appName,
+
+      // AOT/JIT:
+      if (buildInfo.usesAot) ...<String>['--aot', '--tfa']
+      else ...<String>[
         // TODO(zra): Add back when this is supported again.
         // See: https://github.com/flutter/flutter/issues/44925
         // '--no-link-platform',
         '--split-output-by-packages',
-      '--manifest', manifestPath,
-      '--component-name', appName,
-    ];
+        '--manifest', manifestPath
+      ],
 
-    if (buildInfo.isDebug) {
-      flags += <String>[
-        '--embed-sources',
-      ];
-    } else if (buildInfo.isProfile) {
-      flags += <String>[
-        '--no-embed-sources',
-        '-Ddart.vm.profile=true',
+      // debug, profile, jit release, release:
+      if (buildInfo.isDebug) '--embed-sources'
+      else '--no-embed-sources',
+
+      if (buildInfo.isProfile) '-Ddart.vm.profile=true',
+      if (buildInfo.mode.isRelease) '-Ddart.vm.release=true',
+
+      // Use bytecode and drop the ast in JIT release mode.
+      if (buildInfo.isJitRelease) ...<String>[
         '--gen-bytecode',
         '--drop-ast',
+      ],
     ];
-    } else if (buildInfo.isRelease) {
-      flags += <String>[
-        '--no-embed-sources',
-        '-Ddart.vm.release=true',
-        '--gen-bytecode',
-        '--drop-ast',
-      ];
-    } else {
-      throwToolExit('Expected build type to be debug, profile, or release');
-    }
 
     flags += <String>[
       '$multiRootScheme:///$target',
@@ -97,22 +91,13 @@ class FuchsiaKernelCompiler {
       kernelCompiler,
       ...flags,
     ];
-    final Process process = await processUtils.start(command);
     final Status status = logger.startProgress(
       'Building Fuchsia application...',
       timeout: null,
     );
     int result;
     try {
-      process.stderr
-          .transform(utf8.decoder)
-          .transform(const LineSplitter())
-          .listen(printError);
-      process.stdout
-          .transform(utf8.decoder)
-          .transform(const LineSplitter())
-          .listen(printTrace);
-      result = await process.exitCode;
+      result = await processUtils.stream(command, trace: true);
     } finally {
       status.cancel();
     }

packages/flutter_tools/lib/src/runner/flutter_command.dart

@@ -337,6 +337,10 @@ abstract class FlutterCommand extends Command<void> {
     argParser.addFlag('release',
       negatable: false,
       help: 'Build a release version of your app${defaultToRelease ? ' (default mode)' : ''}.');
+    argParser.addFlag('jit-release',
+      negatable: false,
+      hide: !verboseHelp,
+      help: 'Build a JIT release version of your app${defaultToRelease ? ' (default mode)' : ''}.');
   }
 
   void addShrinkingFlag() {
@@ -374,10 +378,18 @@ abstract class FlutterCommand extends Command<void> {
   }
 
   BuildMode getBuildMode() {
+    // No debug when _excludeDebug is true.
+    // If debug is not excluded, then take the command line flag.
     final bool debugResult = !_excludeDebug && boolArg('debug');
-    final List<bool> modeFlags = <bool>[debugResult, boolArg('profile'), boolArg('release')];
+    final List<bool> modeFlags = <bool>[
+      debugResult,
+      boolArg('jit-release'),
+      boolArg('profile'),
+      boolArg('release'),
+    ];
     if (modeFlags.where((bool flag) => flag).length > 1) {
-      throw UsageException('Only one of --debug, --profile, or --release can be specified.', null);
+      throw UsageException('Only one of --debug, --profile, --jit-release, '
+                           'or --release can be specified.', null);
     }
     if (debugResult) {
       return BuildMode.debug;
@@ -388,6 +400,9 @@ abstract class FlutterCommand extends Command<void> {
     if (boolArg('release')) {
       return BuildMode.release;
     }
+    if (boolArg('jit-release')) {
+      return BuildMode.jitRelease;
+    }
     return _defaultBuildMode;
   }
 

packages/flutter_tools/test/general.shard/fuchsia/fuchsia_device_test.dart

@@ -25,6 +25,7 @@ import 'package:flutter_tools/src/fuchsia/fuchsia_kernel_compiler.dart';
 import 'package:flutter_tools/src/fuchsia/fuchsia_pm.dart';
 import 'package:flutter_tools/src/fuchsia/fuchsia_sdk.dart';
 import 'package:flutter_tools/src/fuchsia/tiles_ctl.dart';
+import 'package:flutter_tools/src/globals.dart';
 import 'package:flutter_tools/src/project.dart';
 import 'package:flutter_tools/src/vmservice.dart';
 import 'package:meta/meta.dart';
@@ -111,6 +112,7 @@ void main() {
       expect(await device.targetPlatform, TargetPlatform.fuchsia_arm64);
     }, overrides: <Type, Generator>{
       FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
+      FuchsiaSdk: () => MockFuchsiaSdk(),
       ProcessUtils: () => mockProcessUtils,
     });
 
@@ -122,6 +124,7 @@ void main() {
       expect(await device.targetPlatform, TargetPlatform.fuchsia_x64);
     }, overrides: <Type, Generator>{
       FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
+      FuchsiaSdk: () => MockFuchsiaSdk(),
       ProcessUtils: () => mockProcessUtils,
     });
   });
@@ -180,6 +183,7 @@ void main() {
             sshConfig: mockFile,
             devFinder: mockFile,
           ),
+      FuchsiaSdk: () => MockFuchsiaSdk(),
     });
 
     group('device logs', () {
@@ -378,7 +382,38 @@ void main() {
     });
   });
 
-  group('fuchsia app start and stop: ', () {
+  testUsingContext('Correct flutter runner', () async {
+    expect(artifacts.getArtifactPath(
+        Artifact.fuchsiaFlutterRunner,
+        platform: TargetPlatform.fuchsia_x64,
+        mode: BuildMode.debug,
+      ),
+      contains('flutter_jit_runner'),
+    );
+    expect(artifacts.getArtifactPath(
+        Artifact.fuchsiaFlutterRunner,
+        platform: TargetPlatform.fuchsia_x64,
+        mode: BuildMode.profile,
+      ),
+      contains('flutter_aot_runner'),
+    );
+    expect(artifacts.getArtifactPath(
+        Artifact.fuchsiaFlutterRunner,
+        platform: TargetPlatform.fuchsia_x64,
+        mode: BuildMode.release,
+      ),
+      contains('flutter_aot_product_runner'),
+    );
+    expect(artifacts.getArtifactPath(
+        Artifact.fuchsiaFlutterRunner,
+        platform: TargetPlatform.fuchsia_x64,
+        mode: BuildMode.jitRelease,
+      ),
+      contains('flutter_jit_product_runner'),
+    );
+  });
+
+  group('Fuchsia app start and stop: ', () {
     MemoryFileSystem memoryFileSystem;
     FakeOperatingSystemUtils osUtils;
     FakeFuchsiaDeviceTools fuchsiaDeviceTools;
@@ -420,7 +455,7 @@ void main() {
         mode: anyNamed('mode'),
       )).thenReturn(patchedSdk.path);
       when(mockArtifacts.getArtifactPath(
-        Artifact.fuchsiaFlutterJitRunner,
+        Artifact.fuchsiaFlutterRunner,
         platform: anyNamed('platform'),
         mode: anyNamed('mode'),
       )).thenReturn(runner.path);
@@ -650,6 +685,7 @@ void main() {
     }, overrides: <Type, Generator>{
       ProcessManager: () => mockSuccessProcessManager,
       FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
+      FuchsiaSdk: () => MockFuchsiaSdk(),
     });
 
     testUsingContext('returns "Fuchsia" when device command fails', () async {
@@ -658,6 +694,7 @@ void main() {
     }, overrides: <Type, Generator>{
       ProcessManager: () => mockFailureProcessManager,
       FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
+      FuchsiaSdk: () => MockFuchsiaSdk(),
     });
 
     testUsingContext('returns "Fuchsia" when device gives an empty result', () async {
@@ -666,6 +703,7 @@ void main() {
     }, overrides: <Type, Generator>{
       ProcessManager: () => emptyStdoutProcessManager,
       FuchsiaArtifacts: () => FuchsiaArtifacts(sshConfig: sshConfig),
+      FuchsiaSdk: () => MockFuchsiaSdk(),
     });
   });
 }
@@ -722,12 +760,16 @@ Process _createMockProcess({
 }
 
 class MockFuchsiaDevice extends Mock implements FuchsiaDevice {
-  MockFuchsiaDevice(this.id, this.portForwarder, this.ipv6);
+  MockFuchsiaDevice(this.id, this.portForwarder, this._ipv6);
+
+  final bool _ipv6;
 
   @override
-  final bool ipv6;
+  Future<bool> get ipv6 async => _ipv6;
+
   @override
   final String id;
+
   @override
   final DevicePortForwarder portForwarder;
 
@@ -1073,7 +1115,7 @@ class FakeFuchsiaDevFinder implements FuchsiaDevFinder {
   }
 
   @override
-  Future<String> resolve(String deviceName) async {
+  Future<String> resolve(String deviceName, {bool local = false}) async {
     return '192.168.42.10';
   }
 }
@@ -1085,7 +1127,7 @@ class FailingDevFinder implements FuchsiaDevFinder {
   }
 
   @override
-  Future<String> resolve(String deviceName) async {
+  Future<String> resolve(String deviceName, {bool local = false}) async {
     return null;
   }
 }