ArkCompiler JS Runtime

Introduction

ArkCompiler JS Runtime is the default JS runtime on OpenHarmony. It supports ECMAScript libraries and efficient container libraries. It also provides a set of native APIs for C++ and JS interaction and a variety of garbage collectors that features high performance.

For more information, see ArkCompiler JS Runtime.

ArkCompiler JS Runtime architecture

Directory Structure

/ark/js_runtime
├─ ecmascript             # Implementation of ArkCompiler JS Runtime, including the ECMAScript library, interpreter, and memory management
│   ├─ base               # Base helper class
│   ├─ builtins           # ECMAScript libraries
│   ├─ compiler           # JS compiler
│   ├─ containers         # Non-ECMAScript containers
│   ├─ dfx                # Memory and profiling tool
│   ├─ ic                 # Inline cache module
│   ├─ interpreter        # JS interpreter
│   ├─ jobs               # Queue of jobs
│   ├─ js_vm              # Command line tool
│   ├─ jspandafile        # abc file management module
│   ├─ mem                # Memory management module
│   ├─ module             # ECMAScript module
│   ├─ napi               # C++ API module
│   ├─ taskpool           # Task pool
│   ├─ regexp             # Regular expression engine module
│   ├─ snapshot           # Snapshot module
│   ├─ stubs              # Runtime stub functions
│   ├─ tests              # Unit test cases
│   ├─ tooling            # JS debugger
│   ├─ trampoline         # Trampoline function
│   ├─ ts_type            # TS type management module
└─ test                   # Module test cases    

Constraints

• Only the ArkCompiler bytecode files generated by ts2abc, which is the ArkCompiler JS frontend toolchain, can be run.
• Only the ES2015 standard and strict modes are supported.
• Functions cannot be dynamically created using strings, such as new Function("console.log(1);")).

Building

$./build.sh --product-name hispark_taurus_standard --build-target ark_js_host_linux_tools_packages

Available APIs

See NAPI.

Usage

For details about how to generate JS bytecodes, see Using the Toolchain.

To run bytecodes:

LD_LIBRARY_PATH=out/hispark_taurus/clang_x64/ark/ark:out/hispark_taurus/clang_x64/ark/ark_js_runtime:out/hispark_taurus/clang_x64/thirdparty/icu:prebuilts/clang/ohos/linux-x86_64/llvm/lib ./out/hispark_taurus/clang_x64/ark/ark_js_runtime/ark_js_vm helloworld.abc

For more information, see ARK Runtime Usage Guide.

Repositories Involved

ark_runtime_core

ark_js_runtime

ark_ts2abc