From a29740df6ba393eb4046f41cdac022e01dd2170b Mon Sep 17 00:00:00 2001
From: Divy Srivastava <dj.srivastava23@gmail.com>
Date: Wed, 5 Jan 2022 02:02:48 +0530
Subject: [PATCH] Add aarch64-linux-android support (#860)

---
 .cargo/config.toml                            |    2 +
 .github/workflows/ci.yml                      |   28 +-
 .gitignore                                    |    5 +
 Cargo.lock                                    | 1358 ++++++++++++++++-
 Cargo.toml                                    |   14 +-
 Cross.toml                                    |   11 +
 Dockerfile                                    |   20 +
 build.rs                                      |   58 +-
 examples/android_fractal.js                   |   69 +
 examples/android_fractal.rs                   |  153 ++
 src/wasm.rs                                   |    1 -
 tests/test_api.rs                             |    6 +
 ...oncurrent_isolate_creation_and_disposal.rs |    4 +
 tests/test_ui.rs                              |    2 +
 14 files changed, 1719 insertions(+), 12 deletions(-)
 create mode 100644 .cargo/config.toml
 create mode 100644 Cross.toml
 create mode 100644 Dockerfile
 create mode 100644 examples/android_fractal.js
 create mode 100644 examples/android_fractal.rs

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 00000000..ccf80ad0
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[target.aarch64-linux-android]
+linker = "./third_party/android_ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android21-clang++"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7a1d63ec..f7de37ad 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,30 +24,42 @@ jobs:
           - os: macOS-latest
             target: x86_64-apple-darwin
             variant: debug
+            cargo: cargo
 
           - os: macOS-latest
             target: x86_64-apple-darwin
             variant: release
-
+            cargo: cargo
+          
           - os: ${{ github.repository == 'denoland/rusty_v8' && 'ubuntu-latest-xl' || 'ubuntu-18.04' }}
             target: x86_64-unknown-linux-gnu
             variant: debug
+            cargo: cargo
 
           - os: ${{ github.repository == 'denoland/rusty_v8' && 'ubuntu-latest-xl' || 'ubuntu-18.04' }}
             target: x86_64-unknown-linux-gnu
             variant: release
+            cargo: cargo
 
           - os: windows-2019
             target: x86_64-pc-windows-msvc
             variant: release # Note: we do not support windows debug builds.
+            cargo: cargo
 
           - os: ${{ github.repository == 'denoland/rusty_v8' && 'ubuntu-latest-xl' || 'ubuntu-18.04' }}
             target: aarch64-unknown-linux-gnu
             variant: debug
+            cargo: cargo
 
           - os: ${{ github.repository == 'denoland/rusty_v8' && 'ubuntu-latest-xl' || 'ubuntu-18.04' }}
             target: aarch64-unknown-linux-gnu
             variant: release
+            cargo: cargo
+
+          - os: ${{ github.repository == 'denoland/rusty_v8' && 'ubuntu-latest-xl' || 'ubuntu-18.04' }}
+            target: aarch64-linux-android
+            variant: release # Note: v8 debug builds on QEMU is buggy.
+            cargo: cross
 
     env:
       V8_FROM_SOURCE: true
@@ -158,14 +170,24 @@ jobs:
           . $basename/sccache --start-server
           echo "$(pwd)/$basename" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
 
+      - name: Install cross
+        if: matrix.config.target == 'aarch64-linux-android'
+        run: cargo install cross
+      
+      - name: Build cross docker image
+        if: matrix.config.target == 'aarch64-linux-android'  
+        run: docker build -t cross:aarch64-linux-android-0.2.1 .
+
       - name: Test
+        env:
+          SCCACHE_IDLE_TIMEOUT: 0
         run:
-          cargo test -vv --all-targets --locked ${{ env.CARGO_VARIANT_FLAG }}
+          ${{ matrix.config.cargo }} test -vv --all-targets --locked ${{ env.CARGO_VARIANT_FLAG }}
           --target ${{ matrix.config.target }}
 
       - name: Clippy
         run:
-          cargo clippy --all-targets --locked ${{ env.CARGO_VARIANT_FLAG }}
+          ${{ matrix.config.cargo }} clippy --all-targets --locked ${{ env.CARGO_VARIANT_FLAG }}
           --target ${{ matrix.config.target }} -- -D clippy::all
 
       - name: Rustfmt
diff --git a/.gitignore b/.gitignore
index e249a0ac..59a98763 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,8 @@
 /.cache
 /target/
 /compile_commands.json
+
+third_party/android_ndk
+third_party/android_platform
+third_party/catapult
+third_party/llvm-build
diff --git a/Cargo.lock b/Cargo.lock
index dfb95409..de4ca797 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,24 +2,400 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "ahash"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fcb51a0695d8f838b1ee009b3fbf66bda078cd64590202a864a8f3e8c4315c47"
+dependencies = [
+ "getrandom",
+ "once_cell",
+ "version_check",
+]
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e37cfd5e7657ada45f742d6e99ca5788580b5c529dc78faf11ece6dc702656f"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "align-data"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1926655ba000b19e21f0402be09a1d52d318c8a8a68622870bfb7af2a71315cd"
 
+[[package]]
+name = "android_log-sys"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85965b6739a430150bdd138e2374a98af0c3ee0d030b3bb7fc3bddff58d0102e"
+
+[[package]]
+name = "android_logger"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9ed09b18365ed295d722d0b5ed59c01b79a826ff2d2a8f73d5ecca8e6fb2f66"
+dependencies = [
+ "android_log-sys",
+ "env_logger",
+ "lazy_static",
+ "log",
+]
+
+[[package]]
+name = "arrayvec"
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+checksum = "8da52d66c7071e2e3fa2a1e5c6d088fec47b593032b254f5e980de8ea54454d6"
+
+[[package]]
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+version = "0.33.3+1.2.191"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc4f1d82f164f838ae413296d1131aa6fa79b917d25bebaa7033d25620c09219"
+dependencies = [
+ "libloading",
+]
+
+[[package]]
+name = "autocfg"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
+
+[[package]]
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+checksum = "6e11e16035ea35e4e5997b393eacbf6f63983188f7a2ad25bfb13465f5ad59de"
+dependencies = [
+ "bit-vec",
+]
+
+[[package]]
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+checksum = "349f9b6a179ed607305526ca489b34ad0a41aed5f7980fa90eb03160b69598fb"
+
 [[package]]
 name = "bitflags"
 version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
+[[package]]
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+checksum = "0d8c1fef690941d3e7788d328517591fecc684c084084702d6ff1641e993699a"
+
+[[package]]
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+checksum = "8f1e260c3a9040a7c19a12468758f4c16f31a81a1fe087482be9570ec864bb6c"
+
+[[package]]
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+version = "1.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "439989e6b8c38d1b6570a384ef1e49c8848128f5a97f3914baef02920842712f"
+
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+
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+ "nix",
+]
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+checksum = "22a9137b95ea06864e018375b72adfb7db6e6f68cfc8df5a04d00288050485ee"
+
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+
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+ "objc",
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+
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+dependencies = [
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+
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+]
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+dependencies = [
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+ "libloading",
+ "winapi",
+]
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+checksum = "d0d720b8683f8dd83c65155f0530560cba68cd2bf395f6513a483caee57ff7f4"
+dependencies = [
+ "darling_core",
+ "darling_macro",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a340f241d2ceed1deb47ae36c4144b2707ec7dd0b649f894cb39bb595986324"
+dependencies = [
+ "fnv",
+ "ident_case",
+ "proc-macro2",
+ "quote",
+ "strsim",
+ "syn",
+]
+
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+]
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+checksum = "fcc3dd5e9e9c0b295d6e1e4d811fb6f157d5ffd784b8d202fc62eac8035a770b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
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+
+[[package]]
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+checksum = "ac1b7517328c04c2aa68422fc60a41b92208182142ed04a25879c26c8f878794"
+dependencies = [
+ "libloading",
+]
+
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+checksum = "9ea835d29036a4087793836fa931b08837ad5e957da9e23886b29586fb9b6650"
+
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 name = "either"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
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+name = "env_logger"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a19187fea3ac7e84da7dacf48de0c45d63c6a76f9490dae389aead16c243fce3"
+dependencies = [
+ "log",
+ "regex",
+]
+
+[[package]]
+name = "fnv"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
+[[package]]
+name = "foreign-types"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
+dependencies = [
+ "foreign-types-shared",
+]
+
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+
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 name = "fslock"
 version = "0.1.6"
@@ -30,18 +406,163 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
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+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c31b6d751ae2c7f11320402d34e41349dd1016f8d5d45e48c4312bc8625af50c"
+dependencies = [
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+]
+
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+dependencies = [
+ "cfg-if 1.0.0",
+ "libc",
+ "wasi",
+]
+
 [[package]]
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 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
 
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+dependencies = [
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+ "slotmap",
+ "wasm-bindgen",
+ "web-sys",
+]
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+ "gpu-alloc-types",
+]
+
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+dependencies = [
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+
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+dependencies = [
+ "bitflags",
+ "gpu-descriptor-types",
+ "hashbrown",
+]
+
+[[package]]
+name = "gpu-descriptor-types"
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+version = "1.0.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa32fd3f627f367fe16f893e2597ae3c05020f8bba2666a4e6ea73d377e5714b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "toml"
 version = "0.5.8"
@@ -140,9 +1151,9 @@ dependencies = [
 
 [[package]]
 name = "trybuild"
-version = "1.0.42"
+version = "1.0.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1768998d9a3b179411618e377dbb134c58a88cda284b0aa71c42c40660127d46"
+checksum = "9d664de8ea7e531ad4c0f5a834f20b8cb2b8e6dfe88d05796ee7887518ed67b9"
 dependencies = [
  "glob",
  "lazy_static",
@@ -152,6 +1163,21 @@ dependencies = [
  "toml",
 ]
 
+[[package]]
+name = "ultraviolet"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "16b9e3507eba17043af05c8a72fce3ec2c24b58945f45732e71dbc6646d904a7"
+dependencies = [
+ "wide",
+]
+
+[[package]]
+name = "unicode-width"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
+
 [[package]]
 name = "unicode-xid"
 version = "0.2.1"
@@ -167,8 +1193,262 @@ dependencies = [
  "fslock",
  "lazy_static",
  "libc",
+ "ndk 0.3.0",
+ "ndk-glue",
+ "pixels",
  "trybuild",
  "which",
+ "winit",
+]
+
+[[package]]
+name = "version_check"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
+
+[[package]]
+name = "wasi"
+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.78"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "632f73e236b219150ea279196e54e610f5dbafa5d61786303d4da54f84e47fce"
+dependencies = [
+ "cfg-if 1.0.0",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.78"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a317bf8f9fba2476b4b2c85ef4c4af8ff39c3c7f0cdfeed4f82c34a880aa837b"
+dependencies = [
+ "bumpalo",
+ "lazy_static",
+ "log",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e8d7523cb1f2a4c96c1317ca690031b714a51cc14e05f712446691f413f5d39"
+dependencies = [
+ "cfg-if 1.0.0",
+ "js-sys",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.78"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d56146e7c495528bf6587663bea13a8eb588d39b36b679d83972e1a2dbbdacf9"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.78"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7803e0eea25835f8abdc585cd3021b3deb11543c6fe226dcd30b228857c5c5ab"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.78"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0237232789cf037d5480773fe568aac745bfe2afbc11a863e97901780a6b47cc"
+
+[[package]]
+name = "wayland-client"
+version = "0.29.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9108ec1c37f4774d0c2937ba1a6c23d1786b2152c4a13bd9fdb20e42d16e8841"
+dependencies = [
+ "bitflags",
+ "downcast-rs",
+ "libc",
+ "nix",
+ "scoped-tls",
+ "wayland-commons",
+ "wayland-scanner",
+ "wayland-sys",
+]
+
+[[package]]
+name = "wayland-commons"
+version = "0.29.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "265ef51b3b3e5c9ef098f10425c39624663f459c3821dcaacc4748be975f1beb"
+dependencies = [
+ "nix",
+ "once_cell",
+ "smallvec",
+ "wayland-sys",
+]
+
+[[package]]
+name = "wayland-cursor"
+version = "0.29.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c19bb6628daf4097e58b7911481e8371e13318d5a60894779901bd3267407a7"
+dependencies = [
+ "nix",
+ "wayland-client",
+ "xcursor",
+]
+
+[[package]]
+name = "wayland-protocols"
+version = "0.29.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b3b6f1dc0193072ef4eadcb144da30d58c1f2895516c063804d213310703c8e"
+dependencies = [
+ "bitflags",
+ "wayland-client",
+ "wayland-commons",
+ "wayland-scanner",
+]
+
+[[package]]
+name = "wayland-scanner"
+version = "0.29.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eaaf2bc85e7b9143159af96bd23d954a5abe391c4376db712320643280fdc6f4"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "xml-rs",
+]
+
+[[package]]
+name = "wayland-sys"
+version = "0.29.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba9e06acb775b3007f8d3094438306979e572d1d3b844d7a71557a84b055d959"
+dependencies = [
+ "dlib",
+ "lazy_static",
+ "pkg-config",
+]
+
+[[package]]
+name = "web-sys"
+version = "0.3.55"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38eb105f1c59d9eaa6b5cdc92b859d85b926e82cb2e0945cd0c9259faa6fe9fb"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "wgpu"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eae7181fe6ba5f4b632a9079cc9e922a64555156c87def72c063f94b180c7d68"
+dependencies = [
+ "arrayvec",
+ "js-sys",
+ "log",
+ "parking_lot",
+ "raw-window-handle 0.3.4",
+ "smallvec",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+ "wgpu-core",
+ "wgpu-hal",
+ "wgpu-types",
+]
+
+[[package]]
+name = "wgpu-core"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35600627b6c718ad0e23ed75fb6140bfe32cdf21c8f539ce3c9ab8180e2cb38e"
+dependencies = [
+ "arrayvec",
+ "bitflags",
+ "cfg_aliases",
+ "copyless",
+ "fxhash",
+ "log",
+ "naga",
+ "parking_lot",
+ "profiling",
+ "raw-window-handle 0.3.4",
+ "smallvec",
+ "thiserror",
+ "wgpu-hal",
+ "wgpu-types",
+]
+
+[[package]]
+name = "wgpu-hal"
+version = "0.11.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af28b29ef0b44cd22dd9895d4349b9d5a687df42f58da234871198637eabe328"
+dependencies = [
+ "arrayvec",
+ "ash",
+ "bit-set",
+ "bitflags",
+ "block",
+ "core-graphics-types",
+ "d3d12",
+ "foreign-types",
+ "fxhash",
+ "glow",
+ "gpu-alloc",
+ "gpu-descriptor",
+ "inplace_it",
+ "js-sys",
+ "khronos-egl",
+ "libloading",
+ "log",
+ "metal",
+ "naga",
+ "objc",
+ "parking_lot",
+ "profiling",
+ "range-alloc",
+ "raw-window-handle 0.3.4",
+ "renderdoc-sys",
+ "thiserror",
+ "wasm-bindgen",
+ "web-sys",
+ "wgpu-types",
+ "winapi",
+]
+
+[[package]]
+name = "wgpu-types"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e15e44ba88ec415466e18e91881319e7c9e96cb905dc623305168aea65b85ccc"
+dependencies = [
+ "bitflags",
 ]
 
 [[package]]
@@ -181,6 +1461,16 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "wide"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46bbe7c604a27ca0b05c5503221e76da628225b568e6f1280b42dbad3b72d89b"
+dependencies = [
+ "bytemuck",
+ "safe_arch",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -211,3 +1501,63 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "winit"
+version = "0.26.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70466a5f4825cc88c92963591b06dbc255420bffe19d847bfcda475e82d079c0"
+dependencies = [
+ "bitflags",
+ "block",
+ "cocoa",
+ "core-foundation 0.9.2",
+ "core-graphics 0.22.3",
+ "core-video-sys",
+ "dispatch",
+ "instant",
+ "lazy_static",
+ "libc",
+ "log",
+ "mio",
+ "ndk 0.5.0",
+ "ndk-glue",
+ "ndk-sys",
+ "objc",
+ "parking_lot",
+ "percent-encoding",
+ "raw-window-handle 0.4.2",
+ "smithay-client-toolkit",
+ "wasm-bindgen",
+ "wayland-client",
+ "wayland-protocols",
+ "web-sys",
+ "winapi",
+ "x11-dl",
+]
+
+[[package]]
+name = "x11-dl"
+version = "2.19.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea26926b4ce81a6f5d9d0f3a0bc401e5a37c6ae14a1bfaa8ff6099ca80038c59"
+dependencies = [
+ "lazy_static",
+ "libc",
+ "pkg-config",
+]
+
+[[package]]
+name = "xcursor"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "463705a63313cd4301184381c5e8042f0a7e9b4bb63653f216311d4ae74690b7"
+dependencies = [
+ "nom",
+]
+
+[[package]]
+name = "xml-rs"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2d7d3948613f75c98fd9328cfdcc45acc4d360655289d0a7d4ec931392200a3"
diff --git a/Cargo.toml b/Cargo.toml
index 38f3b7d9..662657eb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ description = "Rust bindings to V8"
 readme = "README.md"
 authors = ["the Deno authors"]
 license = "MIT"
-edition = "2018"
+edition = "2021"
 repository = "https://github.com/denoland/rusty_v8"
 
 exclude = [
@@ -84,9 +84,15 @@ which = "4.1.0"
 fslock = "0.1.6"
 
 [dev-dependencies]
-trybuild = "1.0.42"
+trybuild = "1.0.53"
 align-data = "0.1.0"
 
+[target.'cfg(target_os = "android")'.dependencies]
+winit = "0.26"
+pixels = "0.8.0"
+ndk = "0.3.0"
+ndk-glue = { version = "0.5.0", features = ["logger"] }
+
 [[example]]
 name = "hello_world"
 
@@ -95,3 +101,7 @@ name = "shell"
 
 [[example]]
 name = "process"
+
+[[example]]
+name = "android_fractal"
+crate-type = ["cdylib"]
diff --git a/Cross.toml b/Cross.toml
new file mode 100644
index 00000000..783bde03
--- /dev/null
+++ b/Cross.toml
@@ -0,0 +1,11 @@
+[target.aarch64-linux-android]
+image = "cross:aarch64-linux-android-0.2.1"
+
+[build.env]
+passthrough = [
+    "V8_FROM_SOURCE",
+    "SCCACHE_ERROR_LOG",
+    "SCCACHE_LOG",
+    "SCCACHE_DIR",
+    "SCCACHE_IDLE_TIMEOUT"
+]
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 00000000..d9a08709
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,20 @@
+FROM rustembedded/cross:aarch64-linux-android-0.2.1
+
+RUN apt update && \
+    apt install -y curl && \
+    curl -L https://github.com/mozilla/sccache/releases/download/v0.2.15/sccache-v0.2.15-x86_64-unknown-linux-musl.tar.gz | tar xzf -
+
+ENV TZ=Etc/UTC
+COPY ./build/*.sh /chromium_build/
+RUN \
+	DEBIAN_FRONTEND=noninteractive \
+	ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone \
+	&& apt-get update && apt-get install -y lsb-release sudo \
+	&& /chromium_build/install-build-deps-android.sh \
+	&& rm -rf /chromium_build \
+	&& rm -rf /var/lib/apt/lists/*
+
+RUN chmod +x /sccache-v0.2.15-x86_64-unknown-linux-musl/sccache
+
+ENV SCCACHE=/sccache-v0.2.15-x86_64-unknown-linux-musl/sccache
+ENV SCCACHE_DIR=./target/sccache
diff --git a/build.rs b/build.rs
index 3870999a..19bcf30e 100644
--- a/build.rs
+++ b/build.rs
@@ -103,6 +103,7 @@ fn build_v8() {
 
   // On windows, rustc cannot link with a V8 debug build.
   let mut gn_args = if is_debug() && !cfg!(target_os = "windows") {
+    // Note: When building for Android aarch64-qemu, use release instead of debug.
     vec!["is_debug=true".to_string()]
   } else {
     vec!["is_debug=false".to_string()]
@@ -125,8 +126,14 @@ fn build_v8() {
     // we can't use chromiums clang plugins with a system clang
     gn_args.push("clang_use_chrome_plugins=false".to_string());
   } else {
+    println!("using Chromiums clang");
     let clang_base_path = clang_download();
     gn_args.push(format!("clang_base_path={:?}", clang_base_path));
+
+    if cfg!(target_os = "android") && cfg!(target_arch = "aarch64") {
+      gn_args.push("clang_use_chrome_plugins=false".to_string());
+      gn_args.push("treat_warnings_as_errors=false".to_string());
+    }
   }
 
   if let Some(p) = env::var_os("SCCACHE") {
@@ -151,12 +158,43 @@ fn build_v8() {
   // check if the target triple describes a non-native environment
   if target_triple != env::var("HOST").unwrap() {
     // cross-compilation setup
-    if target_triple == "aarch64-unknown-linux-gnu" {
+    if target_triple == "aarch64-unknown-linux-gnu"
+      || target_triple == "aarch64-linux-android"
+    {
       gn_args.push(r#"target_cpu="arm64""#.to_string());
       gn_args.push("use_sysroot=true".to_string());
       maybe_install_sysroot("arm64");
       maybe_install_sysroot("amd64");
     };
+
+    if target_triple == "aarch64-linux-android" {
+      gn_args.push("is_component_build=false".to_string());
+      gn_args.push(r#"v8_target_cpu="arm64""#.to_string());
+      gn_args.push(r#"target_os="android""#.to_string());
+
+      gn_args.push("treat_warnings_as_errors=false".to_string());
+
+      // NDK 23 and above removes libgcc entirely.
+      // https://github.com/rust-lang/rust/pull/85806
+      maybe_clone_repo(
+        "./third_party/android_ndk",
+        "https://github.com/denoland/android_ndk.git",
+      );
+
+      static CHROMIUM_URI: &str = "https://chromium.googlesource.com";
+
+      maybe_clone_repo(
+        "./third_party/android_platform",
+        &format!(
+          "{}/chromium/src/third_party/android_platform.git",
+          CHROMIUM_URI
+        ),
+      );
+      maybe_clone_repo(
+        "./third_party/catapult",
+        &format!("{}/catapult.git", CHROMIUM_URI),
+      );
+    };
   }
 
   if target_triple.starts_with("i686-") {
@@ -171,6 +209,19 @@ fn build_v8() {
   build("rusty_v8", None);
 }
 
+fn maybe_clone_repo(dest: &str, repo: &str) {
+  if !Path::new(&dest).exists() {
+    assert!(Command::new("git")
+      .arg("clone")
+      .arg("--depth=1")
+      .arg(repo)
+      .arg(dest)
+      .status()
+      .unwrap()
+      .success());
+  }
+}
+
 fn maybe_install_sysroot(arch: &str) {
   let sysroot_path = format!("build/linux/debian_sid_{}-sysroot", arch);
   if !PathBuf::from(sysroot_path).is_dir() {
@@ -387,6 +438,10 @@ fn is_compatible_clang_version(clang_path: &Path) -> bool {
 }
 
 fn find_compatible_system_clang() -> Option<PathBuf> {
+  if cfg!(target_os = "android") {
+    return None;
+  }
+
   if let Ok(p) = env::var("CLANG_BASE_PATH") {
     let base_path = Path::new(&p);
     let clang_path = base_path.join("bin").join("clang");
@@ -395,7 +450,6 @@ fn find_compatible_system_clang() -> Option<PathBuf> {
     }
   }
 
-  println!("using Chromiums clang");
   None
 }
 
diff --git a/examples/android_fractal.js b/examples/android_fractal.js
new file mode 100644
index 00000000..77079862
--- /dev/null
+++ b/examples/android_fractal.js
@@ -0,0 +1,69 @@
+// Copyright 2019-2021 the Deno authors. All rights reserved. MIT license.
+function DrawFrame(frameLen) {
+  const u8 = new Uint8Array(frameLen);
+  const width = 800;
+  const height = 800;
+
+  let x = y = 0;
+
+  for (let i = 0; i < u8.byteLength; i += 4) {
+    if (x == width) {
+      y++;
+      x = 0;
+    }
+
+    x += 1;
+    let r = Math.floor(0.3 * x);
+    let b = Math.floor(0.3 * y);
+
+    u8.set([r, 0x00, b, 0xff], i);
+  }
+
+  let scale_x = 3.0 / width;
+  let scale_y = 3.0 / height;
+
+  for (let x = 0; x < width; x++) {
+    for (let y = 0; y < height; y++) {
+      let cx = y * scale_x - 1.5;
+      let cy = x * scale_y - 1.5;
+
+      let c = new Complex(-0.4, 0.6);
+      let z = new Complex(cx, cy);
+
+      let i = 0;
+      while (i < 100 && z.abs() < 2) {
+        z = z.mul(z).add(c);
+        i++;
+      }
+
+      u8.set([0x00, i, 0x00, 0xff], (y * width + x) * 4);
+    }
+  }
+
+  return u8.buffer;
+}
+
+class Complex {
+  constructor(real, imag) {
+    this.real = real;
+    this.imag = imag;
+  }
+
+  mul(other) {
+    return new Complex(
+      this.real * other.real - this.imag * other.imag,
+      this.real * other.imag + this.imag * other.real,
+    );
+  }
+
+  add(other) {
+    return new Complex(
+      this.real + other.real,
+      this.imag + other.imag,
+    );
+  }
+
+  abs() {
+    return Math.sqrt(this.real * this.real + this.imag * this.imag);
+  }
+}
diff --git a/examples/android_fractal.rs b/examples/android_fractal.rs
new file mode 100644
index 00000000..56b90b4f
--- /dev/null
+++ b/examples/android_fractal.rs
@@ -0,0 +1,153 @@
+// Copyright 2019-2021 the Deno authors. All rights reserved. MIT license.
+
+// Don't run on non-Android targets.
+#![cfg(target_os = "android")]
+// Don't run this as a test in `--all-targets` mode.
+#![cfg(not(test))]
+
+use pixels::Pixels;
+use pixels::SurfaceTexture;
+use std::cell::Cell;
+use winit::platform::run_return::EventLoopExtRunReturn;
+
+#[ndk_glue::main(
+  backtrace = "on",
+  logger(level = "debug", tag = "android_fractal")
+)]
+fn main() {
+  let mut event_loop = winit::event_loop::EventLoop::new();
+  let window = winit::window::WindowBuilder::new()
+    .with_title("rusty_v8 android_fractal")
+    .build(&event_loop)
+    .unwrap();
+
+  // Initialize V8.
+  let platform = v8::new_default_platform(0, false).make_shared();
+  v8::V8::initialize_platform(platform);
+  v8::V8::initialize();
+
+  let mut isolate = v8::Isolate::new(v8::CreateParams::default());
+  let mut scope = v8::HandleScope::new(&mut isolate);
+  let source =
+    v8::String::new(&mut scope, include_str!("android_fractal.js")).unwrap();
+
+  let context = v8::Context::new(&mut scope);
+  let mut context_scope = v8::ContextScope::new(&mut scope, context);
+
+  execute_script(&mut context_scope, source);
+
+  let draw_str = v8::String::new(&mut context_scope, "DrawFrame").unwrap();
+  let draw_fn = context
+    .global(&mut context_scope)
+    .get(&mut context_scope, draw_str.into())
+    .expect("missing function DrawFrame");
+
+  let draw_fn =
+    v8::Local::<v8::Function>::try_from(draw_fn).expect("function expected");
+
+  let mut allowed = false;
+
+  loop {
+    event_loop.run_return(|event, _, control_flow| {
+      *control_flow = winit::event_loop::ControlFlow::Wait;
+      match event {
+        winit::event::Event::WindowEvent {
+          event: winit::event::WindowEvent::CloseRequested,
+          ..
+        } => *control_flow = winit::event_loop::ControlFlow::Exit,
+        // Drawing on android must only happen before Event::Suspended and
+        // after Event::Resumed.
+        //
+        // https://github.com/rust-windowing/winit/issues/1588
+        winit::event::Event::Resumed => {
+          allowed = true;
+        }
+        winit::event::Event::Suspended => {
+          allowed = false;
+        }
+        winit::event::Event::RedrawRequested(_) => {
+          if !allowed {
+            return;
+          }
+          let surface_texture = SurfaceTexture::new(800, 800, &window);
+          let mut pixels = Pixels::new(800, 800, surface_texture).unwrap();
+
+          draw(&mut context_scope, draw_fn, pixels.get_frame());
+
+          if pixels.render().is_err() {
+            *control_flow = winit::event_loop::ControlFlow::Exit;
+            return;
+          }
+        }
+        _ => {}
+      }
+
+      window.request_redraw();
+    });
+  }
+}
+
+fn execute_script(
+  context_scope: &mut v8::ContextScope<v8::HandleScope>,
+  script: v8::Local<v8::String>,
+) {
+  let scope = &mut v8::HandleScope::new(context_scope);
+  let try_catch = &mut v8::TryCatch::new(scope);
+
+  let script = v8::Script::compile(try_catch, script, None)
+    .expect("failed to compile script");
+
+  if script.run(try_catch).is_none() {
+    let exception_string = try_catch
+      .stack_trace()
+      .or_else(|| try_catch.exception())
+      .map(|value| value.to_rust_string_lossy(try_catch))
+      .unwrap_or_else(|| "no stack trace".into());
+
+    panic!("{}", exception_string);
+  }
+}
+
+fn draw(
+  context_scope: &mut v8::ContextScope<v8::HandleScope>,
+  draw_fn: v8::Local<v8::Function>,
+  frame: &mut [u8],
+) {
+  let scope = &mut v8::HandleScope::new(context_scope);
+  let recv = v8::undefined(scope);
+  let try_catch = &mut v8::TryCatch::new(scope);
+
+  let len = frame.len();
+  let frame_len = v8::Integer::new(try_catch, len as i32);
+
+  let ab = match draw_fn.call(try_catch, recv.into(), &[frame_len.into()]) {
+    Some(ab) => ab,
+    None => {
+      let exception_string = try_catch
+        .stack_trace()
+        .or_else(|| try_catch.exception())
+        .map(|value| value.to_rust_string_lossy(try_catch))
+        .unwrap_or_else(|| "no stack trace".into());
+
+      panic!("{}", exception_string);
+    }
+  };
+
+  let ab =
+    v8::Local::<v8::ArrayBuffer>::try_from(ab).expect("array buffer expected");
+  let bs = ab.get_backing_store();
+
+  let js_frame = unsafe { get_backing_store_slice(&bs, 0, len) };
+  frame.copy_from_slice(js_frame.as_ref());
+}
+
+unsafe fn get_backing_store_slice(
+  backing_store: &v8::SharedRef<v8::BackingStore>,
+  byte_offset: usize,
+  byte_length: usize,
+) -> &[u8] {
+  let cells: *const [Cell<u8>] =
+    &backing_store[byte_offset..byte_offset + byte_length];
+  let bytes = cells as *const [u8];
+  &*bytes
+}
diff --git a/src/wasm.rs b/src/wasm.rs
index e1e03e5a..e273fae9 100644
--- a/src/wasm.rs
+++ b/src/wasm.rs
@@ -121,7 +121,6 @@ pub struct CompiledWasmModule(*mut InternalCompiledWasmModule);
 impl CompiledWasmModule {
   /// Get the (wasm-encoded) wire bytes that were used to compile this module.
   pub fn get_wire_bytes_ref(&self) -> &[u8] {
-    use std::convert::TryInto;
     let mut len = 0isize;
     unsafe {
       let ptr = v8__CompiledWasmModule__GetWireBytesRef(self.0, &mut len);
diff --git a/tests/test_api.rs b/tests/test_api.rs
index ffb249a1..dd3f9c3c 100644
--- a/tests/test_api.rs
+++ b/tests/test_api.rs
@@ -857,6 +857,9 @@ fn thread_safe_handle_drop_after_isolate() {
   assert_eq!(CALL_COUNT.load(Ordering::SeqCst), 0);
 }
 
+// QEMU doesn't like when we spawn threads
+// This works just fine on real hardware
+#[cfg(not(target_os = "android"))]
 #[test]
 fn terminate_execution() {
   let _setup_guard = setup();
@@ -4838,6 +4841,8 @@ fn value_serializer_not_implemented() {
   );
 }
 
+// Flaky on aarch64-qemu (Stack corruption).
+#[cfg(not(target_os = "android"))]
 #[test]
 fn clear_kept_objects() {
   let _setup_guard = setup();
@@ -5529,6 +5534,7 @@ fn counter_lookup_callback() {
   assert_ne!(count, 0);
 }
 
+#[cfg(not(target_os = "android"))]
 #[test]
 fn compiled_wasm_module() {
   let _setup_guard = setup();
diff --git a/tests/test_concurrent_isolate_creation_and_disposal.rs b/tests/test_concurrent_isolate_creation_and_disposal.rs
index f4000be6..5cc1e2e0 100644
--- a/tests/test_concurrent_isolate_creation_and_disposal.rs
+++ b/tests/test_concurrent_isolate_creation_and_disposal.rs
@@ -1,3 +1,7 @@
+// This is flaky on cross (QEMU bug)
+// but otherwise works fine on real device.
+#![cfg(not(target_os = "android"))]
+
 use std::iter::repeat_with;
 use std::thread;
 
diff --git a/tests/test_ui.rs b/tests/test_ui.rs
index ba2320f7..333c337a 100644
--- a/tests/test_ui.rs
+++ b/tests/test_ui.rs
@@ -1,5 +1,7 @@
 use std::env;
 
+// Don't run UI tests on emulated environment.
+#[cfg(not(target_os = "android"))]
 #[test]
 fn ui() {
   // This environment variable tells build.rs that we're running trybuild tests,