Android CI: Enable KVM, Caching and AArch64 (#296)

* CI: Bump Android API version and add arm64-v8a target

* CI: Avoid using date +%N

* CI: Enable KVM and caching of AVD

* CI: Change shebang in android driver

.github/scripts/android_test_driver.sh

@@ -15,26 +15,28 @@ for BINARY in $BINARIES; do
     TOTAL=$((TOTAL + 1))
     
     START_TIME=$(date +%s)
-    START_TIME_MS=$((START_TIME * 1000 + $(date +%N) / 1000000))
+    # Busybox date does not support %N, so we can't get milliseconds this way
+    #START_TIME_MS=$((START_TIME * 1000 + $(date +%N) / 1000000))
     
     OUTPUT=$("$BINARY" 2>&1)
     EXIT_CODE=$?
     
     END_TIME=$(date +%s)
-    END_TIME_MS=$((END_TIME * 1000 + $(date +%N) / 1000000))
-    ELAPSED_TIME=$((END_TIME_MS - START_TIME_MS))
+    #END_TIME_MS=$((END_TIME * 1000 + $(date +%N) / 1000000))
+    #ELAPSED_TIME=$((END_TIME_MS - START_TIME_MS))
+    ELAPSED_TIME=$((END_TIME - START_TIME))
     
     BINARY_NAME=$(basename "$BINARY")
     
     if [ $EXIT_CODE -eq 0 ]; then
         PASS=$((PASS + 1))
-        echo "PASSED ($EXIT_CODE): $BINARY_NAME (${ELAPSED_TIME}ms)"
+        echo "PASSED ($EXIT_CODE): $BINARY_NAME (${ELAPSED_TIME}s)"
     elif [ $EXIT_CODE -eq 77 ]; then
         SKIP=$((SKIP + 1))
         echo "SKIPPED: $BINARY_NAME"
     else
         FAIL=$((FAIL + 1))
-        echo "FAILED ($EXIT_CODE): $BINARY_NAME (${ELAPSED_TIME}ms)"
+        echo "FAILED ($EXIT_CODE): $BINARY_NAME (${ELAPSED_TIME}s)"
         if [ -z "$OUTPUT" ]; then
             echo "No output written to stdout."
         else

.github/workflows/main.yml

@@ -268,8 +268,20 @@ jobs:
         arch:
           - name: x86_64
             triple: x86_64-linux-android
-        api-level: [ 26 ]
-      # Don't abort runners if a single one fails
+            emu-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
+          - name: arm64-v8a
+            triple: aarch64-linux-android
+            # Google broke ARM64 emulation on x86_64 hosts. A workaround is to overwrite the qemu machine type.
+            emu-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none -accel off -qemu -machine virt
+        api-level: [ 27, 33 ]
+        # Please note that:
+        # - arm64-v8a emulation on a x86_64 host currently is only possible up to API level 27 Oreo
+        # - armeabi-v7a is only supported up to API level 24
+        exclude:
+          - api-level: 33
+            arch:
+              name: arm64-v8a
+        # Don't abort runners if a single one fails
       fail-fast: false
     runs-on: ${{ matrix.os }}
     name: Android ${{ matrix.build-type }} ${{ matrix.arch.name }} API-${{ matrix.api-level }}
@@ -279,13 +291,31 @@ jobs:
       run: |
         sudo apt-get update -y
         sudo apt-get install patchelf ninja-build -y
-    - uses: nttld/setup-ndk@v1
-      id: setup-ndk
+    - name: Enable KVM
+      run: |
+        echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules
+        sudo udevadm control --reload-rules
+        sudo udevadm trigger --name-match=kvm
+    - name: AVD cache
+      uses: actions/cache@v4
+      id: avd-cache
+      with:
+        path: |
+          ~/.android/avd/*
+          ~/.android/adb*
+        key: avd-${{ matrix.api-level }}-${{ matrix.arch.name }}
+    - name: Create AVD and Snapshot for Caching
+      if: steps.avd-cache.outputs.cache-hit != 'true'
+      uses: hmelder/android-emulator-runner@v2.33.2
       with:
-        ndk-version: r26d
+        api-level: ${{ matrix.api-level }}
+        arch: ${{ matrix.arch.name }}
+        force-avd-creation: false
+        emulator-options: ${{ matrix.arch.emu-options }}
+        disable-animations: true
+        script: echo "Generated AVD snapshot for caching."
+    # We are using the default NDK from the GitHub Actions runner.
     - name: Configure CMake
-      env: 
-        ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}
       run: |
         export TOOLCHAIN=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64
         export CCPREFIX=$TOOLCHAIN/bin/${{ matrix.arch.triple }}${{ matrix.api-level }}
@@ -321,13 +351,14 @@ jobs:
       run: |
         NINJA_STATUS="%p [%f:%s/%t] %o/s, %es" ninja -v
     - name: Test
-      uses: reactivecircus/android-emulator-runner@v2
-      env: 
-        ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}
+      uses: hmelder/android-emulator-runner@v2.33.2
       with:
         api-level: ${{ matrix.api-level }}
-        target: default
         arch: ${{ matrix.arch.name }}
+        force-avd-creation: false
+        emulator-options: ${{ matrix.arch.emu-options }}
+        disable-animations: true
+        target: default
         script: |
           ${{github.workspace}}/.github/scripts/android_test_main.sh ${{github.workspace}}/build ${ANDROID_NDK_HOME}/toolchains/llvm/prebuilt/linux-x86_64/sysroot ${{ matrix.arch.triple }}
 

prepare_android_env.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+export ANDROID_NDK_HOME=~/Library/Android/sdk/ndk/24.0.8215888
+export TOOLCHAIN=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/darwin-x86_64
+export CCPREFIX=$TOOLCHAIN/bin/aarch64-linux-android24
+export CC="$CCPREFIX-clang"
+export CXX="$CCPREFIX-clang++"
+export OBJC="$CCPREFIX-clang"
+export OBJCXX="$CCPREFIX-clang++"
+export AS="$CCPREFIX-clang"
+export LD="$TOOLCHAIN/bin/ld.lld"
+export AR="$TOOLCHAIN/bin/llvm-ar"
+export RANLIB="$TOOLCHAIN/bin/llvm-ranlib"
+export STRIP="$TOOLCHAIN/bin/llvm-strip"
+export NM="$TOOLCHAIN/bin/llvm-nm"
+export OBJDUMP="$TOOLCHAIN/bin/llvm-objdump"
+export LDFLAGS="-fuse-ld=lld"
+export LIBS="-lc++_shared"
+
+cmake -B build \
+  -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK_HOME/build/cmake/android.toolchain.cmake \
+  -DANDROID_ABI=arm64-v8a \
+  -DANDROID_NDK=$ANDROID_NDK_HOME \
+  -DANDROID_STL=c++_shared \
+  -DCMAKE_FIND_USE_CMAKE_PATH=false \
+  -DCMAKE_C_COMPILER=$CC \
+  -DCMAKE_CXX_COMPILER=$CXX \
+  -DCMAKE_ASM_COMPILER=$AS \
+  -DCMAKE_BUILD_TYPE=Debug \
+  -DTESTS=ON \
+  -DANDROID_PLATFORM=android-24 \
+  -G Ninja