Bug 1865886. Add aarch64 profile generation jobs on x86_64 emulator. r=glandium

The new emulator version supports running aarch64 binaries on x86_64

Differential Revision: https://phabricator.services.mozilla.com/D199257

taskcluster/ci/generate-profile/kind.yml

@@ -166,6 +166,46 @@ jobs:
                 - android-system-image-x86_64-linux
                 - android-avd-x86_64-linux
 
+    android-aarch64-shippable/opt:
+        description: "Android 5.0 Aarch64 Profile Generation"
+        shipping-phase: build
+        shipping-product: fennec
+        index:
+            product: mobile
+            job-name: android-aarch64-profile
+        treeherder:
+            platform: android-5-0-aarch64/pgo
+        worker-type: b-linux-kvm-gcp
+        worker:
+            chain-of-trust: true
+            max-run-time: 2700
+            kvm: true  # for access to /dev/kvm for hw accel in the emulator
+            docker-image: {in-tree: ubuntu1804-test}
+            env:
+                WORKING_DIR: "/builds/worker"
+                MOZHARNESS_PATH: "/builds/worker/checkouts/gecko/testing/mozharness"
+            artifacts:
+                - type: directory
+                  name: public/build
+                  path: /builds/worker/artifacts/
+        run:
+            using: mozharness
+            job-script: taskcluster/scripts/tester/test-linux.sh
+            script: android_emulator_pgo.py
+            tooltool-downloads: internal
+            options: [installer-path=/builds/worker/fetches/geckoview-test_runner.apk]
+            config:
+                - android/android_common.py
+                - android/android-aarch64-profile-generation.py
+                - android/android_pgo.py
+        fetches:
+            toolchain:
+                - linux64-clang
+                - linux64-minidump-stackwalk
+                - android-sdk-linux
+                - android31-system-image-x86_64-linux
+                - android31-avd-x86_64-linux
+
     win32-shippable/opt:
         description: "Win32 Profile Generation"
         shipping-phase: build

testing/mozharness/configs/android/android-aarch64-profile-generation.py

@@ -0,0 +1,45 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# mozharness configuration for Android x86/x86_64 7.0 unit tests
+#
+# This configuration should be combined with suite definitions and other
+# mozharness configuration from android_common.py, or similar.
+
+config = {
+    "emulator_avd_name": "mozemulator-android31-x86_64",
+    "emulator_process_name": "qemu-system-x86_64",
+    "emulator_extra_args": [
+        "-gpu",
+        "on",
+        "-skip-adb-auth",
+        "-verbose",
+        "-show-kernel",
+        "-ranchu",
+        "-selinux",
+        "permissive",
+        "-memory",
+        "4096",
+        "-cores",
+        "4",
+        "-skin",
+        "800x1280",
+        "-no-snapstorage",
+        "-no-snapshot",
+        # Disables first-run dialogs
+        "-prop",
+        "ro.test_harness=true",
+    ],
+    "exes": {
+        "adb": "%(abs_sdk_dir)s/platform-tools/adb",
+    },
+    "env": {
+        "DISPLAY": ":0.0",
+        "PATH": "%(PATH)s:%(abs_sdk_dir)s/emulator:%(abs_sdk_dir)s/tools:%(abs_sdk_dir)s/tools/bin:%(abs_sdk_dir)s/platform-tools",
+        # "LIBGL_DEBUG": "verbose"
+    },
+    "bogomips_minimum": 3000,
+    "android_version": 24,
+    "is_emulator": True,
+}