iOS JIT support and enhancements for scenarios app (#10820)

* Make the scripts runnable from any directory

* Add JIT script for iOS

testing/scenario_app/assemble_apk.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
-./compile_android_aot.sh $1 $2
+"${BASH_SOURCE%/*}/compile_android_aot.sh" $1 $2
 
-pushd android
+pushd "${BASH_SOURCE%/*}/android"
 ./gradlew assembleDebug --no-daemon
 popd

testing/scenario_app/compile_android_aot.sh

@@ -22,7 +22,7 @@ fi
 
 echo "Using dart from $HOST_TOOLS, gen_snapshot from $DEVICE_TOOLS."
 
-OUTDIR="build/android"
+OUTDIR="${BASH_SOURCE%/*}/build/android"
 
 echo "Creating $OUTDIR..."
 
@@ -35,15 +35,15 @@ echo "Compiling kernel..."
   --sdk-root "$HOST_TOOLS/flutter_patched_sdk" \
   --aot --tfa --target=flutter \
   --output-dill "$OUTDIR/app.dill" \
-  lib/main.dart
+  "${BASH_SOURCE%/*}/lib/main.dart"
 
 echo "Compiling ELF Shared Library..."
 
 "$DEVICE_TOOLS/gen_snapshot" --deterministic --snapshot_kind=app-aot-elf --elf="$OUTDIR/libapp.so" --strip "$OUTDIR/app.dill"
 
-mkdir -p "android/app/src/main/jniLibs/arm64-v8a"
-mkdir -p "android/app/libs"
-cp "$OUTDIR/libapp.so" "android/app/src/main/jniLibs/arm64-v8a/"
-cp "$DEVICE_TOOLS/../flutter.jar" "android/app/libs/"
+mkdir -p "${BASH_SOURCE%/*}/android/app/src/main/jniLibs/arm64-v8a"
+mkdir -p "${BASH_SOURCE%/*}/android/app/libs"
+cp "$OUTDIR/libapp.so" "${BASH_SOURCE%/*}/android/app/src/main/jniLibs/arm64-v8a/"
+cp "$DEVICE_TOOLS/../flutter.jar" "${BASH_SOURCE%/*}/android/app/libs/"
 
 echo "Created $OUTDIR/libapp.so."

testing/scenario_app/compile_ios_aot.sh

@@ -22,7 +22,7 @@ fi
 
 echo "Using dart from $HOST_TOOLS, gen_snapshot from $DEVICE_TOOLS."
 
-OUTDIR="build/ios"
+OUTDIR="${BASH_SOURCE%/*}/build/ios"
 
 echo "Creating $OUTDIR..."
 
@@ -36,7 +36,7 @@ echo "Compiling kernel..."
   --sdk-root "$HOST_TOOLS/flutter_patched_sdk" \
   --aot --tfa --target=flutter \
   --output-dill "$OUTDIR/app.dill" \
-  lib/main.dart
+  "${BASH_SOURCE%/*}/lib/main.dart"
 
 echo "Compiling AOT Assembly..."
 
@@ -65,12 +65,12 @@ clang -arch arm64 \
 
 strip "$OUTDIR/App.framework/App"
 
-cp ios/AppFrameworkInfo.plist "$OUTDIR/App.framework/Info.plist"
+cp "${BASH_SOURCE%/*}/ios/AppFrameworkInfo.plist" "$OUTDIR/App.framework/Info.plist"
 
 echo "Created $OUTDIR/App.framework/App."
 
-rm -rf ios/Scenarios/App.framework
-rm -rf ios/Scenarios/Flutter.framework
-cp -R "$OUTDIR/App.framework" ios/Scenarios
-cp -R "$DEVICE_TOOLS/../Flutter.framework" ios/Scenarios
+rm -rf "${BASH_SOURCE%/*}/ios/Scenarios/App.framework"
+rm -rf "${BASH_SOURCE%/*}/ios/Scenarios/Flutter.framework"
+cp -R "$OUTDIR/App.framework" "${BASH_SOURCE%/*}/ios/Scenarios"
+cp -R "$DEVICE_TOOLS/../Flutter.framework" "${BASH_SOURCE%/*}/ios/Scenarios"
 

testing/scenario_app/compile_ios_jit.sh

@@ -0,0 +1,81 @@
+#!/bin/bash
+# Copyright 2013 The Flutter Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+#TODO(dnfield): Get rid of this script and instead use proper build rules
+
+set -e
+
+HOST_TOOLS=$1
+DEVICE_TOOLS=$2
+
+if [[ ! -d "$HOST_TOOLS" ]]; then
+  echo "Must specify the host out directory containing dart."
+  exit 1
+fi
+
+if [[ ! -d "$DEVICE_TOOLS" ]]; then
+  echo "Must specify the device out directory containing gen_snapshot."
+  exit 1
+fi
+
+echo "Using dart from $HOST_TOOLS, gen_snapshot from $DEVICE_TOOLS."
+
+OUTDIR="${BASH_SOURCE%/*}/build/ios"
+
+echo "Creating $OUTDIR..."
+
+mkdir -p "$OUTDIR"
+mkdir -p "$OUTDIR/App.framework/flutter_assets"
+
+echo "Compiling to kernel..."
+
+"$HOST_TOOLS/dart" \
+  "$HOST_TOOLS/gen/frontend_server.dart.snapshot" \
+  --sdk-root "$HOST_TOOLS/flutter_patched_sdk" \
+  --strong --target=flutter \
+  --no-link-platform \
+  --output-dill "$OUTDIR/App.framework/flutter_assets/kernel_blob.bin" \
+  "${BASH_SOURCE%/*}/lib/main.dart"
+
+echo "Compiling JIT Snapshot..."
+
+"$DEVICE_TOOLS/gen_snapshot" --deterministic \
+  --enable-asserts \
+  --causal_async_stacks \
+  --isolate_snapshot_instructions="$OUTDIR/isolate_snapshot_instr" \
+  --snapshot_kind=app-jit \
+  --load_vm_snapshot_data="$DEVICE_TOOLS/../gen/flutter/lib/snapshot/vm_isolate_snapshot.bin" \
+  --load_isolate_snapshot_data="$DEVICE_TOOLS/../gen/flutter/lib/snapshot/isolate_snapshot.bin" \
+  --isolate_snapshot_data="$OUTDIR/App.framework/flutter_assets/isolate_snapshot_data" \
+  --isolate_snapshot_instructions="$OUTDIR/App.framework/flutter_assets/isolate_snapshot_instr" \
+  "$OUTDIR/App.framework/flutter_assets/kernel_blob.bin"
+
+cp "$DEVICE_TOOLS/../gen/flutter/lib/snapshot/vm_isolate_snapshot.bin" "$OUTDIR/App.framework/flutter_assets/vm_snapshot_data"
+
+SYSROOT=$(xcrun --sdk iphonesimulator --show-sdk-path)
+echo "Using $SYSROOT as sysroot."
+
+echo "Creating stub App using $SYSROOT..."
+
+echo "static const int Moo = 88;" | xcrun clang -x c \
+  -arch x86_64 \
+  -isysroot "$SYSROOT" \
+  -miphoneos-version-min=8.0 \
+  -dynamiclib \
+  -Xlinker -rpath -Xlinker '@executable_path/Frameworks' \
+  -Xlinker -rpath -Xlinker '@loader_path/Frameworks' \
+  -install_name '@rpath/App.framework/App' \
+  -o "$OUTDIR/App.framework/App" -
+
+strip "$OUTDIR/App.framework/App"
+
+cp "${BASH_SOURCE%/*}/ios/AppFrameworkInfo.plist" "$OUTDIR/App.framework/Info.plist"
+echo "Created $OUTDIR/App.framework/App."
+
+rm -rf "${BASH_SOURCE%/*}/ios/Scenarios/App.framework"
+rm -rf "${BASH_SOURCE%/*}/ios/Scenarios/Flutter.framework"
+cp -R "$OUTDIR/App.framework" "${BASH_SOURCE%/*}/ios/Scenarios"
+cp -R "$DEVICE_TOOLS/../Flutter.framework" "${BASH_SOURCE%/*}/ios/Scenarios"
+